How many brushes do you need to have in a professional makeup kit?

im 14, but whn im older i want to be a make-up artist, id like to kn how many brushes a pro would need. and what is the best type of make up to use. and for me, im dark skin tones, i have indian in me, so what would be a good make up for me, i also have very dark brown eyes and my hair is natuarlly dark brown but right now i have it died black. and any other advice on anything about this would be nice, like what type of brushes id need or jst anything tht deals with make-up that i could use now or in the future. and since i want to be a make-up artist would i have to take cosmitoligy, or is there somthing else i need to take?