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?
I have not done any personalized rules, setup or play reminders. So far it has been enough just learning the game. We tend to play the same games a lot before committing to a new one and that usually helps to cement the details. Sometimes I need a tiny refresher which I usually go to the handbook fore.