Should I begin to look for a relationship now, or would it be best to wait?

You are still young, don't worry about finding a guy right now. You should fulfill your personal goals first. Once you are on your way to becoming the person you want to be, you will start meeting guys with the same interests and goals. Guys your age are not looking that far into the future. Do all the stuff you want to do while you still have a chance or you will regret it later.