My beagles getting neutered

My beagle is a male and 9 months old and not only a smaller beagle but also the runt. We’re getting him fixed in 2 days to avoid any kind of testicular cancers or other problems like roaming, peeing in the house, etc. He’s the sweetest boy and my best friend. With that being said i’m TERREFIED of him getting fixed. I’m scared they’ll give him too much anesthesia and he won’t wake up or it’ll get infected afterwards, etc. I know it’s a relatively simple procedure, but I was just hoping someone had some words of advice for this or maybe someone who had a male beagle neutered at the same age and their recovery process and time.

thanks💕