I want to start a Youtube Channel?

I want to start a Youtube channel and I really do hope to become a successful youtuber. The problem is that I want to do gaming videos such as Minecraft gameplay, Call of Duty, Battlefield, random flash games, etc(Anything that is geeky:3 )… BUT, I also want to do some kind of girly videos like DIY's for room decoration(or etc…), lookbooks, haul, etc… I would also like to do some cooking/baking videos, just simple cooking/baking DIY's.
Pros:
-I already have a channel(ReneeGoMusic)
-I also have a good quality camera. It's not the best but it's not the worst camera I've ever owned.
-I already have some ideas on what to do in the videos.
-I already have my parent's permisson
Cons:
-I don't know what game capture software I should use
-I don't know what video editor software I should use(Windows Live Movie Maker and Windows Movie Maker sucks compared to iMovie)
-I don't know if I should put both 'nerdy' and 'girly' videos on the same channel or not.

How do I start off?

You should make two channels and she which one is doing best then keep uploading on the one thats the best and you shoud use fraps for minecraft. Its dear but itsworth it