My daughter was diagnosed at age 4, and I tried short notes, and just brief, basic information. But it didn't work out too well. It led to a lot of frustrating, and scary times, where the adults didn't realize what a big deal diabetes was. A lot of times, people thought it was too dangerous to let her have a juice, and would try to make her wait, and then I would get there, and her blood sugar would be in the 30s or 40s.
Unfortunately, I think the reality of diabetes is that going out to eat takes forethought (like looking up carbs before you go). My experience has been that the only safe way to leave her with a babysitter is to educate them, and expect a lot of phone calls. I do the same thing with playdates. She is only allowed to houses where I know the parents well, and I expect a lot of phone calls.
I can completely sympathize with your desire to return to a normal life, but unfortunaltely it takes a lot of time to adjust to Diabetes, and you can not underestimate the number of people who are misinformed about it. One thing with the sitter that REALLY helped was when we found a sitter who was also a Type 1 diabetic, she was not only a great babysitter, but also a great role model for my daughter.