I have a question about Nursing school?

I am currently going back to school to become a nurse just after having a baby. I am going into the labor and delivery unit. What are the nursing hours like Pay etc? How much do LVN's make and how much do RN's Make? and what is an LPN? right now I am planning to work as an LVN then later finish up and get my BA in nursing.Would I still be a Registered nurse with a two year degree? sorry if i mispelled typing fast =)