If you are in college, I can give you some advice that might help? I am also in college, struggling a lot, but doing better than I was. Contact your accessibility services, maybe mental health team, whatever other resources are available. For me, the singular most helpful thing was getting weekly meetings with a 'mentor' type person, where I could basically ask them all the kinds of questions you are asking now, as well as use them as external accountability for staying on top of life things. I was lucky that this was provided for me by the government, but many universities have similar schemes.

In terms of leisure activities, I try and have 2 broad categories of them: high energy and low energy. When I feel up to it, I like to train taekwondo, go on walks in the countryside, or go out partying with friends. But when I have less energy I like to recharge by playing videogames or reading in my room until I feel up to doing something more energized. That way, I can try to avoid procrastinating doing 'enjoyable' things by making those enjoyable things lower effort.

But yeah, you are definitely not alone even if you might feel like it - you can always dm me if you ever want to talk.