Neutering?

So, Diezel is four months old and I was thinking that when he hits the golden 5 month age that I would get him fixed, but i'm worried that he's so rambunctious that he might hurt himself or rip his stitches out or something terrible will happen. I need some advice for me to get through his pre and post fixing and what ages everyone got their dogs fixed at? I thought 5 months would be a good age but I wanted to know what age everyone got theirs fixed at. Any advice please