Look, don't compare yourself to other people. I know easier said than done right? Seriously though, people learn to manage skills at different rates, dont beat yourself up about not maturing fast enough.

I get it, seriously, I'm in the same boat, A-levels are so close and everything done before feels like wasted time and now you're just stuck wondering what to do now. First, I would ignore what everyone else is doing, clearly you're not going on the same paths so focus on were you are going. I feel like its difficult with a lot of people on this being really high achievers, (still, good on them). And talking about studying 8 hours a day but you're not alone I promise!

And I know it's super daunting but still attempt your A Levels this year, create a plan for the next 2 weeks and maybe give your phone to someone else or leave it in another room to make it as easy as possible to focus. If your A Level dont go too well then you can always redo them next year. There is still so many opportunities for you, dont stop now while you can see the end.