Check with your employer if they will help with your continued education somehow. My employer, for example, will reimburse some tuition costs if you get a degree while working there.
As a nurse you can continue up to and including a PhD. Or you can go to medical school and become an MD. There are many options. Try to find a few that sound interesting and learn more about them.
If you feel you have unused potential, maybe making a change in your career is just what you need. Even if you just look into what it would take, it could put things in perspective for you.
For those not in the US: it may be covered, but normally it’s a separate insurance plan and not covered by your regular health insurance.
It also varies what type of “dental” care. Some mouth/gum surgeries may be covered by the health plan. I think most dental plans cover checkups. All this varies wildly with your employer and insurance election, though.