Have you had an operation?

i am due to have an op on my left wrist in 2 weeks. It will mean that I’ll be in plaster for 4-6 weeks, with my thumb immobile. Has anyone else had an operation and been able to use the affected limb properly after? My other fingers already have pins and needles, and one is numb, although I can use them. I was in pain but am now having 2nd thoughts about the op. My nurse said to have it done sooner rather than later but that was a year ago. Any advice or suggestions.