Want to do well but can't find motivation

I'm in a tough spot. I just started at a new high school and I realise I'm stronger academically than anyone there. It's been a while since I even had to put effort into exams, and though that's a good thing for my sanity, I just can't be bothered to do any work anymore. Nobody at my school works hard, so I should aim high right? What are my goals, then? I don't feel like putting effort into anything. I'm not even sure if I'll get into uni. No matter what I do, I feel like I get the same results. Everything feels like such a chore, just the thought of opening up my laptop to revise makes me sick.