These are all great gear choices, but if you really want to be a grilling hero, get a couple grill cook books:
https://shop.americastestkitchen.com/america-s-test-kitchen-master-of-the-grill.html
https://www.amazon.com/How-Grill-Everything-Recipes-Flame-Cooked/dp/0544790308
Get a great cookbook for grilling like ATK Grilling or Bittmans book on Grilling. Lots of fantastic flavor combos.
Your game will really take off. Good luck!
https://shop.americastestkitchen.com/america-s-test-kitchen-master-of-the-grill.html
https://www.amazon.com/How-Grill-Everything-Recipes-Flame-Cooked/dp/0544790308