Looking for help with my first bike

Neither, buy a used bike from the classifieds here for that kind of money. You'll get a decent frame, wheelset and drivetrain. It'll be a little 'pre-loved', but it'll be a lot better than some OTP job.

Listen to this guy, I've just built up my first bike and it only cost like £100, its a bit of a beater yeah but it works, and it's great to learn how to fix it and stuff while building, and its cheap as chips