You will not be able to sell property or represent clients who are buying as an agent until you have passed the exams. You can however find buyers and sellers then put them together for a finders fee without being an agent. Just need to talk to a law student or lawyer about putting together a contract for that.
You can do plenty during college if you plan out your time right. I just got my license a couple months ago and am SUPER busy. As long as you can time manage well, you can make it work.