People who wear glasses, what are some things someone new to glasses should know?

Sorry about the awkward title; I had a lot of trouble trying to word it.

Anyway, I got my first pair of glasses yesterday. I went in for my first eye exam in nearly a decade, and apparently I have mild astigmatism. So for the past day I've been getting used to the sensation of having glasses on (I never cared for sunglasses, personally; I've always found them hard to see in) and getting a touch of euphoria about how they conceal the brow somewhat. But then it kinda hit me that I don't really know anything about glasses, having not used them until age 36. I probably should have asked some questions about it when I picked them up, but I was kinda sick and didn't want to stick around there too long.

I know I could just google it, but google sucks now, plus, I may as well use the AskBeehaw platform, it's pretty quiet.