Can I use something besides coconut oil?

Using butter or dairy-free butter also works!

Do you have any tips on achieving cookies that are moist (opposed to dry?)

The most important part of the whole recipe! DO NOT OVER BAKE!! Make sure to take these cookies out when they are just about done (might still have a slight jiggle in the middle) because they will set and keep baking on the hot pan when you take them out. This will give you the most delicious cookie with a chewy center!

Can I use a different flour besides coconut flour?

Coconut flour is much more absorbent than other flours. It allows us to use less to keep calories a little lower. But since it is more absorbent, you would have to 3-4x the amount if you wanted to replace with another flour.