Dude, don't worry about it so much. You're young. You have time. Regardless of where you go you'll have the chance to train. And if you stick with this for any length of time you'll eventually realize that the handful of years pre-yudansha were just a blink of an eye in the larger scheme of things.
Rank isn't a goal. It is just a signpost. And if you take a few detours along the way and repeat a few stretches of road, no big deal. You've got time. Enjoy the scenery. If you really do find it to be a permanent part of your adult life, well, cool, you'll get there.
Train. Learn. Enjoy. Rinse and repeat...