Rootin’ for you, Brian!
One supplemental thought: getting hot air into the chimney and flue will help draw air into the oven. Flame is a process that builds on itself, and ramps itself up.
Because you can’t use chemicals to start the flame (unless you’re finished with cooking food in it and just want to turn it into a nice fireplace 
), you’re limited to using oxygen in smart ways to start, accelerate, and maintain combustion.