Hi Denny.
My go to standard favorite for catfish is more less like others have mentioned but here's the details.
About a 50/50 cornmeal and white flour - maybe a little bit more cornmeal than flour.
Season the mix with salt and black pepper.
Dry the fillets and give them a very light sprinkle of salt.
Use a thin egg wash to coat the fillets - one egg and 1/2 cup of milk -shake off the excess
Dredge the fillets in the corn meal/flour mix.
Add about a 1/4" of vegetable oil to a skillet - cast iron works great.
Heat the oil - add the fish - wait until they just start to turn slight tan before turning - cook twice on each side until they are a nice light golden brown.
Drain on paper towels.
Perfecto.