I alomost forgot: I don't know how prevalent bike theft is in your area, but you need a good lock. This bike will obviously be very valuable to you, but it sounds like all bikes are valuable enough in your area to be targeted for theft. If possible, try to notice the types of locks that most bikes are secured with in your area, and then buy a lock that is at least better than average. the simple answer is to buy the best lock that you can possibly afford.
Oh yes, and wear a helmet, too. You will be putting all of this new bike knowledge into your head. It would be a terrible thing if you whacked your head and lost it all.