Make sure you have a temperature probe to check the centre of any meat you cook, check the core temp just in case.. stuff can look cooked on the outside if you have it on a high setting but underdone in the middle. Obviously as Stat says, veggies might be a better starting point as its pretty...
Now Potter has been sent to bed I can add something to any potential Airfryer Heads, whatever one you plump for when buying, get a bigger one if you can. They won't cook everything but they are a fantastic bit of kit.
I think virtually no one ends up saying " I wish I had not bought it now.. "