Kidney cancer - I think I'm still in shock. I'm also feeling anxious about having surgery. Can someone put my mind at ease?

I have just been told that I have Kidney cancer And I am still in shock I think it’s not really hit me yet I have to have surgery to remove my Kidney it has not spread to any other organs I don’t know how I feel about having such a large operation  I have only ever had minor procedures in hospital I am more anxious of the operation than the diagnosis can anyone  please put my mind at rest xx thank you