never ignore your mental health.
do consider what elders around you say as suggestions and give them a good thought. don't blindly assume it to be wrong or right even it seems so. most often it is somewhere in between.
know your situations and consider the consequence of people you trust breaking it. if the potential consequence is harmful enough to you, try to re-think your decisions.
also, I think you already know this since you're on lemmy, be aware of child grooming. it's better to know the risk than to fall for.
btw what do you mean 11th or 12th? any one of them? I'm curious about your country's school system. you people go to university at 15??