Welcome to the forum.
I use a store bought recipe out of my oven. I use the kind with the cure...not the marinade. I prefer cajun, and anyone who's tried it(there's a few here) will say it's great. It only takes a couple hours in the oven, but the prep time takes an hour or so. I recommend cutting your strips as thin as possible(preferably 1/8 inch over 1/4 inch strips).
I've tried some marinade's for jerky and didn't care for them, so I only recommend brands that use curing.