I don't have much wisdom except to say that I feel I can relate to you on many levels. I've never kept with college, I move a lot, and have recently sprained my foot bad. So I cannot dance or ride my bike, which I love, and I'll never take my able body for granted again..
Are you doing doctor's visits for your knee?
Searching for your place in the world is completely normal and shows intelligence. You will find your place. (: Life is a journey. (:

I live in California too by the way! So cal.