Learn programming?

but im probably dreaming too big

No you're not. You underestimate yourself. There is not "too big" when it comes to having a hobby. You don't need to prove anything, just do something you enjoy and that makes you feel good about yourself. The difficult part is getting out of the house, not the actual activity. I won't recommend anything specific here because lots of people in this thread have already, and also the activity does not really matter, only that you do something that engages you.

Anything creative, as a lot of people have suggested. It's highly satisfying to see a finished product you crafted yourself. And they really make you get in the zone and hyperfocus.

Scrapbooking is a good one. Sift through your photos, find some that bring back good memories and get them printed. Invest in a small spiral bound scrapbook, some acid-free coloured paper and decorations (you can get these from poundshops/dollar stores). Look at other people's scrapbooks online and shamelessly copy their designs until you can come up with your own.

Maybe you could even make some for the people you care about. Added bonus of being able to go over good memories with them. Maybe you can bring a smile to both of your faces.

Another cute one is making models out of greyboard (the grey cardboard on the back of refill pads).

Best of luck, I hope you feel better soon!

Right now I’m trying chess. I absolutely suck at it, but I can play it on demand at any time online and getting better at it. Don’t really play against live opponents often, but rather play bots or solve puzzles mostly. It helps get the mind to think about something else and makes me want to learn due to how bad I was initially. Still bad, just less so.

Turn the passive watching into something a bit active if you can. I like watching TV, and I sometimes try to analyze the data from them. Similarly, if you like watching youtube videos, maybe examine what it is that excites you about them, if any, analyze and introspect.

For me, it was running and reducing alcohol to very moderate levels. I'm at the point now that I crave a run to clear my mind and lower my stress. I rarely ever feel depressed anymore. Total game changer for me.

A cat? It forces you to do something useful everyday, which will make you feel good. Maybe a dog is even better, since you'd have to walk it, but a dog is a harsher commitment than a cat. You can't skip a walk with a dog, just because you re having a bad day. A cat however, will be fine for a day of neglect as long as you keep it's bowl full. A cat also enjoys playing outside though, so you could try that as well.

I had a kid, which didn't cure my depression, but it took away all my time. I didn't have time to think about depression anymore, so I kinda forgot about it. Though I wouldn't recommend having a kid for anything besides just wanting to have a kid.

I'm positively surprised that I've not seen gym suggestion within 10 comments.

Drawing of course 😁! I think it would help to get your emotions out.

Juggle. You must have 3 similar ball shaped items around the house. There's lots of tutorials online. You get your blood feeling, body moving. Such a nice rush when you finally get that new pattern or trick you were working on.

Whittling is also a good one, low investment and relatively simple.