I'm white (for what that's worth) and there's lots about your experience that to be honest that I cannot relate to well. But you seem like a really good person who's struggling all on their own (I'd probably guess you don't have family in Canada at the moment) in a really difficult situation.
In Western countries, plastic surgery for self-esteem reasons does not usually increase self-esteem.
I strongly, strongly recommend you seek counselling (with someone who has experience with racism) if you can access it. Maybe resources are available though school, maybe there are resources available in your city/province. If you can get some professional help, I'd really recommend it. I get the sense you're fighting a huge battle on your own, and with all due respect I think you're overwhelmed and becoming a little delusional (which to be fair is an understandable reaction in the face of unsolvable stress).
I'd suggest you say "I am considering multiple facial surgeries to cope with people discriminating against me at school, work, and in relationships because I'm Black. I don't think I can be happy or successful if I don't get facial surgeries that make me look less Black."
If you can't access professional support, try to seek out or strengthen your Black social support network - find people with whom you can experience community. Maybe a students' organization, a religious group, etc. I think things have gotten to the point where professional support may be necessary and non-professionals on their own might struggle to help you. Both would be good.
I had a best friend from Ghana. He was one of the most attractive men I've ever seen, and he was very popular. Nevertheless, his self-esteem was shit. It was shocking. Eventually he got married and he's quite happy now. But Ghana to Canada may have been a major major culture shock on him that having someone to honestly talk to about might have helped with.
Unfortunately, I don't think you'll find much relief until you're tackling the real issue: your ongoing struggles with and internalization of anti-Black racism (as well as social isolation, perhaps).
P.S. Black is not bad, and if your "friends" are making fun of your race they're not your friends.
Good question! I did a little digging. I think a good number of people accessing managed alcohol programs (MAPs) are homeless, and MAPs are designed to help with homelessness and alcohol use disorder. First, accessing a MAP is intended to prevent people from consuming "non-beverage" alcohol, like mouthwash or rubbing alcohol that can lead to hospitalization. It is also intended to prevent drinking and intoxication in public, which leads to negative consequences with law enforcement. Through compassion, stability, and other provided resources (e.g., shelter, food), MAPs are also intended to help people get off the street.
https://catalyst.nejm.org/doi/full/10.1056/CAT.22.0301