I can't believe people would pay someone to do an oil change on this bike. I'm doing all of the maintenance except a valve adjustment, which is really an easy task once you get to the valves. I did all of the maintenance on my last 178cc scooter. It was a great learning experience. I hate changing brake fluid though, brake fluid is evil. That shiz will kill your paint in 0.2 secs.
When you change your brake fluid, try to put some shop cloths around and having a partner helps as well to keep spillage to a minimum.
Hopefull by the time you get to the valve adjustment and if you're willing to try, more people will have input on how to do them.
I don't know if you've done one before, but the CBR doesn't really look too bad. You don't have to remove the cams which saves a lot of pain.