I have had about 8 crowns for many years, some are over 40 years. Having had a two year course of steroids this affected my teeth/bones and I've had to have new crowns and crowns replaced. Some are fitted to an original tooth but most are on a metal post where the tooth was removed.
Sometimes a crown has had to be removed to have work done to an underlying tooth. Mostly they come off quite easily, sometimes it takes more effort from the dentist..... but never has it been painful.
Fortunately it doesn't bother me going to my dentist, which is just as well.
My last course of treatment was two root canals, two replacement crowns, two extractions meaning two false teeth on a denture.
Tell your dentist that you are nervous, he will really understand. My dh was in law enforcement and also in the forces. He was afraid of little, but broke into a sweat at the dental surgery, we're talking his shirt being soaked at the back. Happily he found a good local dentist who was willing to talk through every step and provide plenty of local anaesthetic. He blames the forces dentist for his fear .... not much of a bedside manner.
Nowadays dentists are kind and understanding. You will be fine. Good luck