Congrats on getting into the OCC nursing program! I just graduated from there in April 2013 and passed my NCLEX-RN last week. Brace yourself for the journey that is nursing school
! The program is very time-consuming and has very high standards.
Anyway, just out of curiosity, what made you decide to leave dental hygiene? Nursing, too, is saturated (especially for new grads). Of course, though, when there's a will there's a way. However, at present, many of the hospitals have hiring freezes and/or reluctantly hire new grads (especially ADNs). My advice is to get a job as an aide/patient care tech somewhere before you graduate to make the transition to an RN easier.
I worked part-time as an aide in a rehabilitation/skilled nursing center throughout school (and until a few weeks ago) and will start working full-time next week as an RN at the same place. Extended care facilities aren't for everyone; however, they are open to hiring new grads and can be a good place to start.
Best wishes on your nursing-school journey!