To pile on, yes, it's possible. It will become clear to you whether this is feasible for you after you get your academic feet wet. You'll take a lot of tests, get assigned to various sections, work with your academic adviser to build your course matrix, and your path and the options will become clearer.
We have two sponsor '15 daughters who validated many plebe level courses, took courses as one of the few plebes in the youngster (sophomore) class, and are double-majoring in an engineering field and language. Both of them chose voluntary summer school (and gave up leave) this summer to ease up on the academic year course load. We also have/had many sponsor mids who either gave it a try, and decided it wasn't for them, or elected to focus energies on one major and more ECAs (extra-currricular activities).
Point is, everyone's path is different. You are all A game players when you arrive, but someone gets the Bs, Cs, Ds and Fs once here. Once you figure out whether you are pack-plus, pack, or pack-minus in terms of where you stand compared to classmates, you can determine what makes sense for you. Key to success is eyes on the goal of commissioning and desired service selection, with the requisite academic and military performance record to get you there.
As pointed out by an experienced earlier poster, this is w-a-a-a-y ahead of the game, but a good question.