Well, what do you like to do/what interests do you hold? If you follow an interest (any interest) then it is a hobby. For me, it is video games and learning irrelevant information about my favorite sifi shows. I have been reading articles on the Stargate Universe's ship "Destiny" and about it's history and functions. Something like this could be a hobby. If you can figure out what interests you, then you can participate in that area of interest and learn more about it. Boom! Instant hobby! Good luck!