I'm sorry I can't be of help as far as the track to take - I just went to a 4 year college and got my BSN. I didn't have previous experience and was never a CNA. That can definitely help and many people say you should...I just didn't b/c I wanted to focus on school.
As far as the job? You will get varying opinions. It is a stressful job, but I truly feel fortunate that I am a nurse. I love working w/ and helping patients (most of them lol) and you just can't beat the hours. If you get a hospital job, you really can't beat the pay for working 3 days a week. Yes, they are long hours, but it goes by so fast and then you get 4 days off a week.
That being said, just know that there will be good days and bad days. There are times that I go in to work and all of my patients can care for themselves, so I just need to do assessments and give medications... Other days I'm running around from start to finish w/ a patient or two crashing, or some that are bed-ridden. So, some days, I go home and say, "This is a great job!!" and other days I say, "What have I gotten myself into?!?!" lol But it balances out. Yes, you will have both kinds of days. The good days do out-weigh the bad.