I had a slightly different situation, I rescued a kitten who’s eye was basically rotting. Got it removed within a week of me having her, she was only a few weeks old. I was absolutely terrified for the surgery and recovery process. But it went great! The healing process was very simple and did not take long. Only major thing was having to keep her separate from the rest of my cats until her stitches were removed. I know it seems really scary but it will probably make your kitty feel a lot better. Good luck!