I have a steam feature on the oven, that should be fun to play with.
I tried making sourdough about 6 years ago. The oven was gas and heated from the bottom, the bottoms were DARK. It was also a massively hydrated recipe. A challenge to get into the DO, to say the least, and with no banneton's, no fun.
I wasn't happy enough with the results to keep at it. This is a much better start. A few nitpicks and personal preferences, but that's better than disappointments.
Is straight up all purpose good? I used Einkorn, which is very whole wheaty, and had no rye so I split the rye ratio with AP and Einkorn.