Some dentist are looking for no experience but to make good money and learn the technology you need school. Plus you can go for expanded functions ( meaning) you can put all composite and amalgam fillings in for the dentist that will get you the furthest in the Dental field. If you go to Dental Assistant program you might as well just go for your EFTA. They didn't offer that class when I went to school 30 years ago. But you do have to be X-Ray Certified to make any $. I don't regret ever becoming an Oral Surgical Asst. I live for my job. I love waking up and going to work. I definitely love my job.
I believe you can be certified to be a dental assistant through local programs. There are also offices who will hire on and train you as well.
Hope this helps. :)