Hello Alex: Thank you for bringing your concern here to PC.

I see this is your first post. So... welcome to Psych Central.

One additional forum, here on PC, that may be of interest to you would be the social anxiety forum. Here's a link:
https://forums.psychcentral.com/soci...ective-mutism/
You might also check out the school & study issues forum:
https://forums.psychcentral.com/scho...-study-issues/
I'm sorry I don't think there is anything in particular I can suggest here. Hopefully there will be some other members who will have some suggestions they can offer. In the meantime, however, here are links to 4 articles, from Psych Central's archives, that (hopefully) may be of some help, the first by our host Dr. John Grohol, Psy.D.:
Social Anxiety Overview
6 Ways to Overcome Social Anxiety
Overcoming Social Anxiety the Alchemist's Way | NLP Discoveries
https://psychcentral.com/blog/9-soci...ocial-anxiety/
I hope you find PC to be of benefit.