My mom doesn't believe in mentall illnesss because "that's for white people", but I really want to see a psychiatrist what should I do?
I would start by going to a guidance counselor (or an adult you can trust) and have your mother attend along with you. Or go to group therapy sessions with other peers.
Have you mother attend these sessions with you, if possible.
I would also call city services and see if there’s someone that can guide you to an alternative way.
Also, try 7cups.com and talk to someone there about it.
Taking small steps are the best thing to do.