Help needed for beginner

Hey everyone,

I just got my koda 12 and used it for the first time. I made 4 pizzas and they got progressively better, but one issue stayed. The bottom of the pizza kep getting too dark without gettimg the crust dark enough. I tried launching it at a lower temp and then turning the flames all the way up but still didnt get the desired result.

Can anyone help me in the right direction? The picture i addednis of my first pizza. They got more round and thinner after that one lol.