So when i started playing Starcraft 2 i played Protoss then a couple of months ago i switched over to Terran, now im thinking of learning to play Zerg well. Can anyone give me any tips or strategies? 

Sry it failed and posted twice.

expand early

Watch this:
  

Thanks that was really helpful.

zerg tips... the tip is keep the queen living and protect the queen as much as possible and surround the queen during battle.. TREAT HER AS A QUEEN FIT FOR HER CROWN..
 

Zerg is a balance of droning a ton, barely holding off a push and then hulk smashing the face of your opponent as you rebuild your army faster. 
 
I almost always play 15 hatch against any match - it puts a timer on for you opponent if they're on 1 base they have to expand or come kill you before your economy takes off.  Need to watch how to read what the opponent is doing so you can respond correctly which takes some time. 
  
What league are in now? A lot of strats that people use in bronze (all in's mainly) people don't really do in some higher leagues.