That’s why I chose super soil! Low maintenance. All the nutrients are in the soil. It’s easy. Just mix soil and super soil together in the bottom third of the pot and then the rest with just soil. All that’s required is plain water to grow. Biotabs work the same way but you just put a tab in the soil.
Super Soil Organic Concentrate
Amazon product
https://www.biotabs.nl/
As far as forums, I did find some old posts about using soil in Autopots I think, maybe in the biotabs section. It’s basically the same process as any other medium in Autopots. Just make sure you have good drainage in the soil - perlite. Biotabs has specific instructions for using their product in soil in Autopots.
I messaged the super soil people and they said they’d had plenty of Autoflower growers who’ve used their amendment successfully but they do make another amendment specifically for Autoflowers. They said the Autoflower amendment is quicker release but both amendments will work for autos. I bought the regular because it’s available in a larger amount for less money.