Posting this here because I do not need a stupid answer like "go get a girlfriend" or "go on dates". I don't need a female in my life.

I am currently studying Built Environment at University. This is all going really well and I'm doing very good. I am twenty years old and have enough friends. In the weekends we usually get wasted in a bar. It's really a lot of fun because they don't need females around to have fun, just like me.

But that fun is for the weekends. My problem is, whenever I have spare (I have quite some because I can easily keep up with school work) I am bored to death. I work at a car delivery company, but this is only once a week. I had to quit my other job because of extreme lower back pains. I don't do sports too because of this. I used to be a gamer but I am not getting any kind of fun out of that anymore.

I am a bit lost because I am bored to death at least 4 evenings a week, where I just sit behind my laptop for 4 straight hours and browse reddit or watch dumb YouTube video's.

Long story short: I really need something to occupy my time whenever I have spare time, something I can do and easily quit again. A hobby of some sort. I really want to do competitive swimming but because of blasted eardrums (got surgery for this) this seems like a bad idea.

All I need is some ideas really, that I can do at home whenever I have some spare hours. Quite frustrating to be a student with lots of spare time, but not knowing how to spend it.

Anythings welcome really.