So im quite new to the general biking market. I recently picked up this bike and i wanted to turn it into a fixie as i find it way more fun than a conventional bike.

Then again i am more of a computer geek than a bike enthusiast I have very little clue on what to do with my rear wheel. Should i just buy a new wheelset or can i get a fixed cog for this hub?

Also my town isn't exactly "flat" And im crossing bumpy roads daily so would it look weird to add a "damper-fork" to it? I am from Norway so my english is probably not the best.
Cheers