I have no skills or talent.
How does one gain a hobby?
the academic community has reached a general consensus that skill and talent are most frequently the results of the tens of thousands of hours spent on an activity. Don't worry about what you're good at, focus on what you like to do. After a few weeks you will certainly notice improvement. So go paint, write music, shoot at targets, or play frisbee golf with the mindset that -you will get better-
How about chess ?
It's nice for otaku to learn enthusiastically.
Let's bet horse racing!
Do something, anything, and work to become good at it. Could be knitting or mathematics. Just do stuff!
Just like the other ones encourage you to do anything, I agree. A tip however, is to separate productive hobbies (making/learning stuff, learn instruments, make music, paint, build stuff) from non-productive hobbies (consuming stuff, watching TV, reading books etc).
Try picking up ukulele and playing it. It's fun. Really it is. It beats playing the guitar, at least for me.
Just find something you like.
May I suggest videogames?
I was with you till you put reading into your non-productive hobbies list. At which point my eyes glazed over and all your words turned into "this guy is a retard". Reading is the #1 hobby a human can take up, the entire human experience is locked in books. You can learn everything from books, math, chemistry, physics, gardening, home improvement, programming, poetry, all of it. Don't lump reading in with watching TV, don't lump it in with doing something pointless like snowboarding or painting either though.