Toppings look good, but the crust is lacking that oven appeal. You might want to try ditching the dutch oven and use two pizza stones. I use a steel pizza on the bottom rack and a stone type pizza stone on the top rack about 8-12inches above. The two stones trap the heat, so if your oven only goes to 500F, it can reach temps between the stones of 600F+ which is what you need for the good crust appearancea and texture. Let the oven heat for about an hour with the stones in.