I am the (non-nurse) dad of a 19 year old son (who has just completed a Pharmacy Tech. Certification program). 17 is so young: do you have a HS diploma? or GED? If so, what was your grade point average? My suggestion is to stay in school if you can afford it, beyond HS. Here, in WA state, at least, it is VERY easy to find NO-COST CNA/NA programs. I do not think the NA work would be the best fit for you; however, I do not know you, either.
Look at it this way, if you could put yourself ahead 5 years from now, what would you feel like doing at that point? You have time on your side; if you feel like helping people by making a difference in their life, and can do well in biology, math, and the like, I encourage you to continue in the healthcare field via education.
But before that, I have 3 suggestions: First, do your career homework online before committing to any one field. Then, attempt to volunteer at the sorts of places you think you may like to work at. Finally, attempt to "job shadow" an experienced person in a field you think interests you. Ask questions of what their job is really like. "Look before you leap". Nursing, and other allied healthcare careers, are not all about bathing grumpy old men. Check out Medical Assistant (MA) and LPN careers; male nurses are in high demand, and always will be. Best wishes.