W.S.
Trish,
I hope I can offer some helpful advice. As others stated, visit the the counselors and financial aid office of the university that you wish to attend. While you're planning your future, plan big. Have you thought about working on a BSN?
I finished my Bachelor's (not in nursing) as a single mother while working full time. I also received financial aid. I found it was easier to continue taking classes without stopping. As a single parent, you should qualify for grants that will pay for most of your tuition, books, etc. Loans should cover a lot of your living expenses.
If you have joint bank accounts, go open your own immediately. Either of you can withdraw from or close a joint account, don't let him me the one to do so.
Also, if he wants the divorce, make sure that he has to pay for all attorney and court fees.
It is easy to concentrate on the hurt feelings and not the business side of a divorce. Do not let him exit this marriage without a solid alimony/child support agreement.
Also, not to stir the pot, but do you have any suspicion that a third party might be influencing his decision? If so, I wouldn't agree to the typical "irreconcilable differences" as the reason for the divorce.
Good luck to you and your little one!