Hi and Welcome,
We do not judge, and we do understand how hard this is.
I think you need to make recovery a priority but you will need to decide if you have to drop out of school or not. What I do know, is that early recovery requires a lot of changes. I had to remove several people from my life and started exercising regularly. I stayed away from people who were drinking for many months.
Counselling can be helpful and AA can also be useful. The main thing in recovery is motivation. If you really want to stop, you can do it.