Digital art is pretty fun if you're at all artistic, even technical drawing using AutoCAD or a similar software can be fun to learn and will give you a new skill. Try to use something you already like as a jump off point (ie draw a scale model of a weapon from a game).

I recommend the Blender donut tutorial video. It's free on YouTube and Blender is free. Free is awesome and it's educational and pretty fun.

I'm sorry you've been feeling depressed. I know how that can make it difficult to start getting into other things. I have a couple suggestions. One is to just let yourself get bored enough to wander around the internet and find cool things. If you find something you want to try like an art tutorial, don't pressure yourself or anything, just give it a go! I made a lot of art in high school using stuff like photoshop or free programs and it eventually got me into graphic design. I sometimes wish I still had the time to mess around with stuff like that! And another one, if you're into tech and want to try new hobbies, you might be able to volunteer at the local makerspace which would give you a membership there. I used to not have a lot of hobbies, but I got into 3d printing. It's so fun to make stuff without needing talent. If you can't afford a hobby like that, a makerspace would let you try out stuff like that and meet other people with creative hobbies like coding, 3d printing, and making robots. :)