I love a veggie packed pizza, but I am aware my kids, and most, would prefer a plain cheese or pepperoni. I compromise with my kids by just doing less of the veggie filing, than I would in mine, and a bit more cheese for them. The veg filling can be made in advance, then you can customize from there.

Premade doughs can be tricky. You want to bring them to room temperature, so they are easier to roll out.

If you use a gluten free crust, just make a veggie pizza per normal, no calzone-ing. None of the GF doughs (in my experience) are able to fold and seal well enough to make a calzone.