I suggest you take whatever courses you can on line first. If you are working with patients now, you might have an idea of whether you'll like nursing. The thing with nursing is your options open up as to where you work and what you have to do.
If you're sure you don't want nursing but something in the medical field you could work toward that. Have a friend who was a plumber but is now and resp therapist.
Too don't listen to negative people just go for it.
I'm ready to take the plunge, but realizing I have to find a new full time job in the medical field that hopefully makes close to what I make now, go to school full time during the day, AND hope my new employer foots a good chunk of the bill for schooling. Easier said than done. It would make things so much easier if they just had a night time CNA course.