If you can pull off competitive grades in the BSN program which is a higher load I would do it first. I did the ADN first, got into an ICU internship as a new grad, then right into my RN-BSN. It has kept me busy. I think you would be better off doing BSN right off the bat. That way you would be more competitive for the ICU slots, and you could focus totally on your ICU skills, where I have been having to split my time between my ICU work and RN-BSN work. So I rarely pick up OT shifts. If you were not in school it would be much easier to take OT shifts. That is my 2 cents.