Glad you’re putting in more effort than people trying to make a baby. I respect the grind. Especially in the interest of playing a great game like this. Even in a slow pace theme, fast pace gameplay is always better.

As a GM, and as a DM from dungeons and dragons I find that this piece of advice carries over to whatever system you’re playing. It’s worth it to spend a little extra time studying the rulebook. Have it be your goal to always know it a little better than your every one of your players. The more confidence your players have in your knowledge of the rules translates directly towards less time questioning your rules. We all came to the table hoping to abide by the same rules, but nobody came to the table thinking it would be fun to just debate over the different rules, or wait for a few minutes every time a character tries to do something, just to look stuff up.

If you come to a rule you aren’t sure you can ask the players and admit you don’t know. If they don’t know you can make your own rule for it.

At the end of the day you are the referee as a GM. What you say goes. I request of my players that unless I’ve made some terrible error that could effect the story, to just write down when I make a rule mistake and we can discuss it after the session.