My sister and I are both CNAs and currently going to school. I am in nursing school
and my sister is working towards OT. Both are great fields to enter into however they both have things you may need to consider.
Nursing is great as far as flexability, there are many different fields to choose from, different shifts that can chater to your life style, and time spent in school can be as short as a year to 4 years. However there are a lot of waiting lists and it does require a lot of physical endurence, it also requires you to sacrifice weekends and holidays (something that is surprisingly over looked by many people I talk to).
Occupational therapy is great because it is more of a 9-5 job, like nursing there is a whole spectrum of options from working with kids in schools
to working with the elderly in nursing homes. Unlike its fellow therapies such as physical and speech it covers a much wider spectrum of patient needs so there is little chance of getting bored and a lot of the therapy can be made to be fun! Also the pay for OT is much higher than of nursing. However it does require some physical strength and it now requires a masters degree, so that is a lot more time spent in school.
I hope this helps, if you have any questions feel free to ask me! Good luck!