I had stellar dentists up until I moved to a new city and had my first experience with a bad dentist. Never again.
Now I'm old enough to know better and here's my advice: brush and floss once a day before bed. Don't eat anything after you do so. If you want to get rid of "morning mouth", rinse your mouth using diluted hydrogen peroxide. Put a very gentle amount of pressure on the teeth using the brush. You don't need to scrub them.
If you can get a descaling from a dentist, take advantage of it. Ask the hygienist to use a local numbing agent on your teeth before cleaning (the gel not the injection). They'll know what this is. It makes the descaling far less painful and sort of pleasant.
When it comes to procedures like crowns or wisdom teeth, only deal with it if there is pain. I had my wisdom teeth removed and I disagree that it was medically necessary. They would have come in normally.
And if you know a medical professional, ask them who their doctor is and then ask that doctor who their dentist/doctor/eye doctor/etc is. Go to the medical professional other medical professionals go to if your insurance allows for it.
Good luck fellow HN friends.