Welcome and enjoy your bike ! yes a Ulock is a must, personally I have Kryptonite keeper which is not the best one but it does the job. The brutal truth is that there is no lock that will stop an experienced thief but they will definitely slow down the process. As far as maintenance look up vids on youtube and when you go to get your bike service dont be scared to ask question and always tip the mech, and make friend with him/her =). I would highly recommend tire liners which will help with puncture resistance. Also a very basic and essential tool is going to be your home floor pump. Oh yeah and watch this to learn how to lock up your baby ! tell us about your first commute !