Definitely plan a holiday for when you are recovered. As others have said, anaesthetics these days are extremely safe, look at the hip replacements on 90 year olds done now that would have been out of the question a few years ago.
In the days when I was nursing, we used to give omnopom and scopolomine an hour before theatre, the scopolomine to dry up secretions, and the omnopom (morphine derivative) to remove all worry, it certain did that, you went down to theatre floating on air! No longer prescribed, but the morphine type drugs you will have on waking will leave you floating happily above any pain.
I hope everything has been explained to you in detail so you know what to expect. Your anaesthetist will come and see you about an hour beforehand, do ask him any questions worrying you, he will reassure you. You will probably walk down to theatre and lie on a trolley bed in a little anteroom, you won't see the theatre itself. An injection will be given into your hand or arm, which will make you feel woozy, and you will be asleep within 10 seconds. The next thing you will know will be the nurses talking to you as you come round in the recovery room, any you will be wheele back to your bed.
You will have a catheter in with a bag attached to the side of your bed, and quite likely a drip in your arm for 24 hours. You may have oxygen being fed just under your nose for a few hours. One word of warning, beware the senokot if you are sensitive to it, and only take one of the two tablets!
I am sure it will all go smoothly, I imagine you will go 'off air' for a few days, but do come back and tell us how you are getting on when you feel like it? Wishing you a speedy recovery.