Start by reading here:
I have no idea how you would know if a career is right for you without some kind of personal interaction with a provider.
Most school systems have an OT and PT at least contracted for services for students. Start there. Call or meet with the special education director in your district. Tell them of your interest and see if you can shadow one of these folks. Our school OT and PT and SLP staff members were very happy to share info about their professions.