What guy? Dark Souls ISN'T hard. It's just a test of memory.
Couldn't you use that argument about just about any hard game, though? I'm fairly positive someone out there will say that Castlevania or Ninja Gaiden aren't hard, just a test of memory too.
Any difficulty in Dark Souls can be nullified with co-op play or by leveling stats and gear. The game can be completed at level 1, so a level 60 or 100 or 713 character certainly shouldn't find it difficult. I haven't played Castlevania or Ninja Gaiden but I don't think they have ways to get around the difficulty like that.
If it's your first time playing, Dark Souls is pretty hard until you learn to adapt. Otherwise, it ranges from difficult to easy, depending on how many times you've played it.
The unknown nature of the game is probably the biggest factor in any perceived difficulty by new players.
Well, why are you making a game? If it's to gain experience making a game, then it probably would be better to program in a language you're comfortable with. If you're making a game to teach yourself more about a programming language, maybe go with one you're not familiar with.