a) plenty of people start and finish uni much older than that
b) I hate to break it to you but chances are even if you went to uni earlier, you wouldn't have spent your 20s "travelling", you would've most likely been working in a job of the variety "stare at excel for 8 hours a day then go home" and maybe spent a week or two a year of annual leave doing that...you'll actually have more time (albeit probably less money) for "travelling" in a degree than when working full time...