OK BillyCoen, it's time for you to help yourself. Go out into the big wide internet and find out what a development environment is, and what a sdk is, and what minigp32 is, and what devkitadv is. The information is all out there, I'm not repeating it here.
And then, like I said before, tell us what you have done, and what errors you saw. You have not given enough information for us to have any idea what your problem is, so how can anybody help you?