Test, test, test & keep notes. Then you will know what works.
Don't forget reciprocity failure.
With my 6x6 Zero a sunny outdoor exposure is probably a few seconds. Interiors can range from 15 minutes to a couple of hours, depending on the light level. I used to use my Sekonic meter & adjust from that, now I use the iPhone pocket light meter app. I mostly use Tmax 100.