I've been in a very similar situation to you, right down to many of the details. There are a ton of obvious suggestions, e.g. exercise, try to go outside everyd

I've been in a very similar situation to you, right down to many of the details. There are a ton of obvious suggestions, e.g. exercise, try to go outside everyday even for 5 mins, talk to friends more, focus on one side project at a time etc. but the problem wasn't the ideas for me. it was the motivation to do them. For that, the thing that helped above all was therapy and opening up more to my closest friends. I wish you all the best - things can change quicker than expected.