i'd recommend FL studio. fl studio can be a little expensive, though, so other programs like reaper ($60) or lmms (looks to be free) are also great options. if you wanna go pro, ableton's a great place to look too!
just start making whatever you feel like, get those skills up! you can try bigger projects later on, but if you wanna start, the name of the game is practice.
VariableGR
try to start what free programs you can use or that you have available
He also does a lot of research on music production and everything that goes with it.