Help? with starting coding for nds

[oooooomonkeys]

Hi i've been thinking i want to try my hand at making my own homebrew after seeing everyone else over the past months.
but i dont have a clue about where to start?
so could anyone give me some advice or tips on where to start learning how to code for the ds what tutorials are best etc that kind of thing.
but remember ive never done this before so i need to learn easy stuff first lol.

Thanks for any help.

[oooooomonkeys]

and can it be done on the ds itself? as i suppose it would be better if i can be doing it where ever i go.