Hi Tahirah and welcome!
You're off to a good start - doing some research, and asking questions. I can't give you specifics about the specialty titles you selected, but can tell you about the degrees/licenses. Also, keep looking on this and other web sites for information. Don't forget to check with the NJ state nursing association, and student nurses association. You can select from allnurse.com home page to see and go to lists of nursing organizations, by state and specialty. Try www.nursesource.org
Have you selcted some colleges to apply to? The colleges you pick will have information about their program and a visit with someone (admissions advisor) from the nursing dept. will also give you some more information. Don't forget to visit college websites - most will give you information about the program requirements, courses etc. Try to select an program that's approved by the NLN (National League for Nursing).
LPN = licensed practical nurse. LPN programs are probably 18mos-2yrs in length and you take a licensing exam, which allows you to use the title LPN after you pass. Do more research in your area about what job opportunities are available. LPNs are allowed to provide care under the direction of and RN or MD, but are not supposed to assess patients and may have restrictions related to certain medication administration. One of the hospitals I worked at only use LPNs as advanced patient care associates, (to me a waste of a licensed professional).
RN = Registered Nurse, there are many ways to become one, and plenty of opportunities once you do as far as job opportunities, both in and out of the hospital. There is plenty of info on this site extolling the merits of the different degrees.
ADN = Associate Degree in Nursing, aka AAS = Associate degree in Applied Science
This is usually conferred by a community college, technically it should be a 2year degree, but with changes and maybe waiting lists in the good programs expect it to take longer. Getting the general courses, and pre-requisites done ahead of starting the nursing classes is usually a good idea. An ADN can sit for the RN boards - the exam that you will have to take and pass to be allowed to use the title RN.
Diploma - some hospitals provide their own progrram of nursing education, usually with a local community college. Graduates of these programs also can take the RN boards and become RNs. I've no idea how available these programs still are.
BSN = Bachelor of Science in Nursing This is usually provided by a college or university and is 4-5yrs in length. Once completed, you take the same RN board exam as the ADN and Diploma graduates.
MSN = Master of Science in Nursing the higher you go with your education, the more opportunities open up to you.
NP = Nurse Practitioner requires MSN and NP license on top of your RN license. You get to prescribe medications and provide primary care. Imagine if you will, your own practice, hanging out a shingle and setting your own hours.
PhD or ND = Doctorate degrees - you could someday be writing the textbooks and teaching the nursing students to come.
Try to decide where you want to be for college, and when you start working, what you (and your family) can afford for school (remember it is time and money), and which college program can help you get there. Another thing that might help is volunteering at a local hospital and inquiring about shadowing a nurse (following for a day or more).
Good luck and best wishes!