Tonight's adventure with the air fryer was a success. Tofu chunks (still have another 1/4 of the package left) and sweet potato, rolled in oil plus salt, pepper, and paprika, then into the air fryer for 10 minutes on "French fries" setting. Very tasty and it was neither burned nor undercooked.
One part in the instructions made me laugh. In the "how to deal with problems" section, it lists:
White smoke is coming out This is normal. Don't worry about it.
Black smoke is coming out Your food is on fire.