Pick up a book and read. This is much more difficult than it seems for some of us, but forcing your mind to concentrate even briefly will help hold the line against losing whatever mental capacity you have that remains unaffected by the drugs and the disorder itself. Experiment a bit. Anything that you do out of genuine love or interest counts as a form of therapy. Be prepared for the possibility that your current career aspirations may not be viable now or sometime in the future.
Bipolar disorder tends to worsen with age.
This alone is sufficient reason to be prepared. I urge you not to limit yourself, that is not my intention here at all, but be realistic regarding what you can expect of yourself and above all, don't blame yourself for those things you've done your best to overcome or deal with in some positive way. When it becomes clear that a situation is unworkable, then don't let wishful thinking prevent you from taking steps toward a new, and possibly more satisfying direction. Writing down your thoughts, feelings, and past experiences will aid in making concrete the reality of where you've been with this illness and where it is you'd like to go. Writing is a kind of therapy as well, as anyone who has kept a diary or a journal can testify.