Currently, OT requires a Master's. There is a movement for it to be a doctorate in the future, however. You have to have a Bachelor's, have certain pre-req's (usually Chem, Biology, Psych, etc), and...
I am an O.T. and have been for the past 10 years. I have learned that I like working in hospitals the best, vs outpatient or SNFs or ALFs, etc. I like working with the medically acute patient....