Hey,Terry.
If I was Terry i will be working as a dentist for a time until i find a job to replace this.
Having a family requires money and job obviously,so, i will have worked as a dentist to be ok with my obligations.
Stop working as a dentist if this doesn’t make you happy,but find another job also.
Furthermore,don’t give up on your dreams and hobbies ,it’s never to late to study if you want a degree for your dreamy job.
Do the best to touch your goals your dreams and your life.You don’t want to regret in the future for actions you didn’t try.
It seems you have passion,and that passion you should turn into actions.Do the best and forget about everything.
Eventually,save some money (from the job you’re doing now) to spend it for the degree, you’re future job.
I don’t think it’s illusion, i think that you have to fight for your dreams even if it’s hard.
Good luck!