1. If you make the crust too thick it will have a biscuit texture. Go for a thin crust for a more traditional texture.
2. Caution: don't let the dough sit too long in the bowl after you combine the ingredients, as it will start to "grow" from the apple cider vinegar and the baking powder and get really soft. Please see the video. And add as much flour as your need to roll it out. I've made this so many times, so I'm quite used to working with this dough, so be patient with it and yourself. The more flour you add, the more it will come together for and you'll be able to roll it out.
3. You can add spices and flavors to the dough, such as garlic granules. oregano, Italian Seasoning, onion granules, etc.
4. If you're not comfortable using your cooling racks (or not sure if they are oven safe) Bed Bath and Beyond sells a cooking/baking rack for pizzas (however, it looks like the same exact material as my cooking rack). But some folks might feel more comfortable with this: Pizza Baking Rack