Whenever I have trouble getting back into a game I like to make my own setup and rules summary to make it easier in the future. These are intended for myself only so they take shortcuts and make assumptions about how I think about the setup and play and even our typical player count (2). I will share an example in a comment.
Do you ever do something like this?
Yep I do this. The game can take 15 minutes to teach, but an hour for me to re-learn if I have to read the rules again. If I write my “teach” into a cheat sheet it’s so much easier to replay because it removes the mental barrier of having to read yet another 39 page manual.
Plus, there’s always some tricky rule that everyone gets wrong the first time I explain it. My notes help me ensure I teach it “right” the first time.