Welcome to the addiction and impending slippery slope of track mods.
It's great that you have your wife DEing too, as that's a great way for a spouse to understand the addiction. My sister always rolls her eyes when my brother and I discuss track days. She did some parade laps at COTA in May and now has an appreciation of what we do.
It's amazing how prepared you feel you are before a DE but can still have a sloppy 1st session. It takes a certain amt of time to get into a rhythm. Taping your runs is a great way to learn. You'll see so many places to improve. That creates a burning for the next DE.
12 days until INDY. Can't wait.