You can either go for an associates degree or a bachelors degree to become an RN. If you are wanting to become a neonatal nurse, do not become an LPN...you will need to be an RN for that area. Your best move would be to speak with a college counselor at the local community college (if they offers an Associate Degree in Nursing program) and also speak with a college counselor at a 4 year college that offers a Bachelor of Science in Nursing. That way you can decide for yourself which program fits you the best. If you go for the community college and the associates degree, be aware that it will most likely take you 3 years to complete the nursing program. If I could do it again, I would've just gone to get a Bachelor of Science in Nursing right from the start...since I wound up getting it anyway later and it cost me more in the long run because I paid for an Associate degree and then later I paid again for a Bachelors degree.
An L&D nurse and a neonatal nurse are two different areas of nursing. If you read my post above (under this same thread), I explain all the different areas within Obstetrics. If you eventually work in a small hospital, you might be able to do them both. If you work in a large hospital, you most likely will not.
I would suggest you read as much as you can about nursing in general and about the particular area of nursing that interests you. Don't be surprised if after you study nursing, your area of interest might change...and that is ok. The only way to really know where you fit in, is to give it a try and you will have alot of opportunities for that when you rotate your way through clinicals in school. It is incredibly important to get as high a grade a possible in all your classes as nursing school admission is very competitive and alot hinges on your grades. Good luck with your decision.