On a completely different note:
Kudos for your service. It is appreciated.
Good move on planning to start small. Don’t let anyone talk you out of it (though if they try to talk you up from the 125, don’t worry about it- 250s are still very sane for beginners).
Finally, if you want to ride your bike on base when you get back, you will have to take an MSF class, and I think that they make you wear hi-vis vests- so if you are worried about the cruiser image, get over it.