Actually, "leaving them to it" and not explaining everything over and over worked out well in my favor. Many of them had questions when I came out, and explaining didn't help with understanding for all of them. What happened with those was they they said "I don't get it", but followed it up with well whatever, I respect you and do what you gotta do, I won't understand it so it's probably pointless to try kind-of-thing. The friendships/relationships actually got better in some cases, or stayed the same... which was the best outcome I could have asked for really. I don't enjoy telling people these things. Some of them obviously shoved their confusion aside or else went and looked up the definitions on their own. I rarely get asked about it anymore.
So maybe don't worry about people knowing everything about the process and the condition. What matters is that your friends remain your friends and don't see trans as being some sort of prefix for you or the only thing they can talk about with you. One of the things about life is that you'll never know if anyone truly understands you, nor will you truly understand anyone else and what's in their mind. And that's ok, so long as your interactions are pleasant.