Scoop 3 tbsp of batter into the skillet and form into a circle of even thickness.
Cook for 2-3 minutes on one side, then flip and cook for another 2-3 minutes on the other. It should flip fairly easily so if you can't get your spatula under it without it falling apart, cook it longer. This also goes faster if you have a griddle!
You can make your own oat flour at home by grinding instant or quick oats in a food processor or coffee grinder. You can use steel cut as well but they won't get as fine.