Dental Assistant or Medical Assistant?

Im planning on going to a tech school, im 31 yrs old now. I want to have a much better job...right now im working on a retail store. My boyfriend is encouraging me to go to school and that really makes me feel good. He says he will pay my school, (true story) but now the thing is that i dont want him to spend money on something i cant do or not sure if i would like it. Im stuck in between Dental Assistant or Medical Assistant, i would like to hear some opinions or experiences on these job areas. 😅 Thank you in advance.