I am a due in April/finishing school in April student nurse. If you take proper precautions for airborne patients (mask, etc) then it shouldn't be a problem, I would think. The precautions are there to keep you safe, pregnant or not. Lifting? I have been in nursing school
the entire duration of this pregnancy and have never had to lift anything I couldn't handle. A nurse wouldn't be pulling a patient up in bed alone. I have had to lift some, but with proper body mechanics, it was nothing unmanagable. My school also required me to have no restrictions whatsoever, and as I told my dr, I am not doing anything a RN wouldn't do, and he was fine with it.
As early as you are, I'd be more worried about morning sickness and some of the "smells" that accompany nursing!
Otherwise, just go with it, do what you feel comfortable with. You know what you can handle and what you can't.