I don't know how to do any of those things
for music use melody raiser, you touch random song until you get a song you like for your game, for vn engine use renpy, for learn programming and use renpy use SLim Games and ElaineDoesCoding (youtube channels)
for art, start drawing A LOT
i hack and mod vn and games like hobby, i want to made my own vn but im bad at art hahaha