Sterilisation- advice needed from women who’ve had it done

I want to be permanently sterilised. Background info: I am 24, and since I first found out about sterilisation 8 years ago my opinions have not swayed. I have absolutely no desire to procreate. I would like to foster older children when I’m in my late thirties, but I do not want my own genetic children.

I would like to know if tubal litigation causes pain in the long term; and if you had difficulty getting a doctor to agree to perform the procedure.

I live in the UK but interested in views all over the world. My plan is to ask the NHS first, and failing that pay for private sterilisation.

Thanks in advance 😊