And the very best of luck to you; at least for me, music is the most rewarding thing I do, or have ever done.
I think everyone is a little different when it comes to how much one should practice. If, however, you are going to a BM performance, you probably will want to practice at least two hours per day (take one day a week off!); you may find you want to practice even more than that. But two hours, in my humble opinion, will probably do very nicely, assuming that you use the time reasonably. You may be able to get by with less, but that may not satisfy you. If your specialty is to be composition instead, you should be able to get by with somewhat less -- but what and how you practice will be rather different.
All in my opinion; others no doubt will vary!
A practice routine will vary so much depending on your situation that one really can't say what and how. The best routines, though, will split the practicing into two or more parts, of an hour to an hour and a half each, with something else in between. This is much more effective than trying to do it all in one lump. One excellent approach (in my view!) is to have one session in the morning -- possibly even before breakfast -- and another in the evening. But you will have to see how you can fit things in. You might want to at least consider getting a good digital keyboard (and I do mean good) for where you live. They aren't cheap, at least ones which are satisfactory for actually learning to play the piano aren't (look in the "instruments" section of the forums for comments), but it might give you a lot more flexibility than having to depend on instruments at your college.