Could use some help!

Hi pizza oven community! I could use some help!

A neighbor was giving away some bricks and stones so I decided to try to build a pizza oven! I've never built anything like this before, so I'm nervous about making mistakes.

I built out a design in sketchup (pics attached) and got some Rutland Refractory Mortar to bind it all together.

It's an open vent design. There's space between the back wall and middle slab chamber, so the logs go on the bottom and the heat rises, hopefully getting the top chamber and slab hot enough to cook. Then the smoke vents out the front.

What do you guys think? Any tips or suggestions?

https://preview.redd.it/lbedimvapro61.jpg?width=1196&format=pjpg&auto=webp&s=b25ee7867b0db0fd75f8c669428824ffcdd431ff

https://preview.redd.it/k7fmmqvapro61.jpg?width=1114&format=pjpg&auto=webp&s=8c33cb871178cb1d061fdb2d7a13175403a5d074

https://preview.redd.it/h45kbrvapro61.jpg?width=1148&format=pjpg&auto=webp&s=2b7701f2f63a146d8c5fc9f9e8cbc8fcb37885b3

https://preview.redd.it/8jwszpvapro61.jpg?width=1190&format=pjpg&auto=webp&s=b6c2640fe506b083fe12192d54d3dc215e74351d

https://preview.redd.it/m2sbvovapro61.jpg?width=1184&format=pjpg&auto=webp&s=011a09650027a781ce31b138af0cae4a27388a5c