You're probably in a better place than most severely depressed people because you think that you can get better! Probably the best thing to do is keep a growth mindset and try to learn as much as you can about depression. Getting over depression is a journey.
Lots of other people have said running & friends, those things help me. But recently/now I am depressed and running 40 miles a week and seeing my friends regularly.
What's a really cheap solution? Pirate some bibliotherapy books! Feeling good by David D. Burns is older, but I'm reading it right now and it seems like a really solid CBT book. I would also recommend "Adult children of emotionally immature parents". It helped me understand why I am the way I am
The hardest part for me is noticing when my thoughts are turning situations from good or neutral into bad situations. Paying attention to your thoughts in an objective way is hard! But some sort of mindfulness practice can help.
Journaling can be useful! You can train your brain to look for good things by writing out 3 good things that happened or you did every night.
I use Plex and jellyfin, honestly, plex only stays around because of plexamp. It's just too good. I don't like using streaming apps like Spotify or whatever because they're not as good