It takes very little time, and you should feel absolutely nothing!
The worst part is the injection - which takes a long time to go in, but your dentist should spray your gum first. Because they use a lot of aneasthetic, it can take a while...a few seconds..my dentist squeezes injections in v slowly, as it's better that way, for some reason.
The extraction should be REALLY quick. The dentist will actually push into the tooth, rather tna pull, and then just remove it with tweezers. You might be able to hear it loosening for a brief split second - a little noise like fingers on sandpaper.
The dentist will pack the tooth area with a swab.
If you take a couple of paracetamol or nurofen before the aneasthetic wears off, it won't even be painful later.
the idea of the whole thing is much worse than the event.
But i do sympathise. i had a big tooth out a couple of months ago.
Good luck