“Best way to learn a new game?”
Make a cheat sheet. I prefer procedural outlines, but whatever works for you.
Good ‘ol Paul Beakley wrote about this
though it was shared privately, so you may not be able to see it. (Do you have public posts about this, Paul? This was all I found.)
The point is that just reading the rule book is probably not enough.
When I was running Marvel Heroic, it took making a complete outline, with page references, of the core mechanic to get me really comfortable as a Watcher (GM). It clarified the system for me, and using it at the table proved invaluable; I would just tick down the outline each time we engaged the system. After a while, I was able to internalize it and the game ran smoother and smoother.
So, my habit now is:
1) Read the rules;
2) Read the rules again and take notes;
3) Build procedural outlines from the notes;
4) Run/play the game using the outline;
5) Iterate on the outline;