OK, so i picked up WOW some time ago, and almost always play a Hunter, so DPS is all i've ever done, so i decided to play either a healer or a tank, i can't choose.
So my questions are:
should i heal or tank?
which one is easier for a newb at both like me to learn?
which race should i choose?
which class should i choose?
what spec?
 
thank you guys for your help!

no one? damn.......

Are you planning on playing Horde or Alliance?

isn't this a question better answered by a dedicated warcraft forum? 
 
when i used to play i used to get information like this from elitist jerks. that site still around?

You should tank if you want the easier role.  If you're alliance, a Draenei is good for Paladins and I think DKs, and a Human if you're a Warrior.  Although it really doesn't matter all that much.  On horde, probably a Tauren for DK/Warrior, and you have to be a Blood Elf for the paladin.  I haven't played in like 6 months, so this may not be still true, but Paladins were the best tanks when I left, but it could be completely different now.

Whichever you like the most. That's the only answer.

Oh man, if all you've ever effectively played as is DPS, I can't say that it'll be smooth sailing when you transition into healing, or even tanking.  I'd suggest healing, as I've experienced some pretty unforgiving tanking both as a healer and DPS.

Both are the worst possible classes you can pick. Talk about a major headache, I was a tank, and I quit because I was a tank. Healing isn't an easy job either. 
Ranged DPS is so laid back...

Where was I? Oh, you can always roll pally and roll both classes.
 
I rolled a pally and AOE tanking makes group tanking much easier, and raids always look for a Healing pally thanks to our crit heals.
 
No other class can tank and heal at the... Well, I guess Druids could sorta do that.  Pfft, nature lovers.
 
Oh, and I might have retired but it's FOR THE HORDE! to the end.

Go Paladin if you ask me, I played it and it's great if you can't decide to heal or tank.
From personal experience a very good tanking class, depending on your preferred style of healing a decent class.
I hate how you constantly have to heal as a paladin where a druid just has to keep up HOTs (I have a Druid/Paladin both on 80) but the druid is a 'terrible' tank due to being a dodge tank with ICC.

Race depends on faction - do you have a personal preference?
If you're going Alliance, Draenai is the best for paladins (+1% hit, which'll save you a bunch of hit rating) although I hate their animations. Humans will be my fav alliance race.
Horde is Blood Elf only, or Tauren if you're waiting for Cataclysm.

As to the role it really depends on your own personal style, I loved tanking because you're basically the one in control. Mob position / priority and how the pull goes etc.
Healing always feels very submissive since you're not really having a direct input.

Just gonna give a basic run down of the questions you have been asking and my experience. 
 
 should i heal or tank?  
Tanking was the easiest transition for me and started when BC came out. I too played and hunter and still do. I went to Druid and Pally tanking. They are the easiest of all of them since WoW is mainly about AoE tanking in heroics. If you intend you raid the AoE is a bit lighter especially in Icecrown but in terms of accessibility i would say Pally or Druid.  
Healing was a difficult transition for me mainly because i don't really enjoy it as much. If you cant take criticism well maybe healing and tanking are just bad for you since either one will always get blamed. Druids are mainly about healing through HoT's while the other classes are about direct heals. Druids can take a bit to get used to since your heals wont come right away and you will have to trust that your hot's will heal. And if you are unsure and start spamming your direct heals you can easily oom yourself.

which one is easier for a newb at both like me to learn?  
I would definitely say tanking is relatively easy to pick up if you play one of the easier tanks. Pally>Druid>DK>Warrior. Each has their strengths but i feel this post will be long enough and if you want me to elaborate i will later.

which race should i choose?  
Human tanks are very nice with their free trinket which can save you if a mob stuns and you lose all your mitigation and get bursted. Trinket the stun and you should be fine. Horde dont exactly have anything comparable but they each have their utility. Taurens still have great health and their AoE stun which i did enjoy when i tanked with my Tauren warrior. Again lots of minor differences here. 

which class should i choose?  
Like i said before easiest skill barrier would be either pally or druid. They are also the most annoying to level. Pallys get to essentially auto attack to 50 until they get crusader strike. This is of course assuming you level ret. Druid have it slow until around 20 when they get cat form. Then you have little downtime and eventually get mangle which is very nice for leveling. 

what spec?      
Obviously each one has their very prominent tank tree. The only one that doesnt is DK's but even now they are either stuck into blood for self healing or you can see the occasional frost spec. Blood is probably the easier spec. 
 
If you need more in depth info feel free to ask. I have been playing since WoW's release and have a fairly good knowledge base of each of the classes. As always there are other sites such as the WoWWiki for other general information that can help you.

you should heal, because there are barely any healers anymore, and plus for a tank you need to focus on aggro more, but on healer it is extremely easy.

both are pretty easy tbf, and if youy've got the in-game gold for it, you could duel-spec a paladin to do both. 
 
i will say this tho, there is a lot of pressure on the tank and one slip-up or loss of aggro will mean that throughout the rest of the instance, everybody will tell you how you should do everything haha

" OK, so i picked up WOW some time ago, and almost always play a Hunter, so DPS is all i've ever done, so i decided to play either a healer or a tank, i can't choose. So my questions are: should i heal or tank? which one is easier for a newb at both like me to learn? which race should i choose? which class should i choose? what spec?  thank you guys for your help! "

Be a pally.

woah, awesome tips, thanks guys, i think i'll start a human pally (actually i happen to have one laying around for about a year now :D) and try tanking, if i get bored, or if it's too much for me to handle i'll try a healing class or respec. thanks for all the helpful info guys (and gals)

" Be a pally. "

" no one? damn....... "