Welcome to OCDO!
Open carry is legal in Ohio. You may carry loaded, in a holster. I recommend a good retention holster that fits your firearm.
Until you get your CHL you must unload your firearm AND all your magazines or speed loaders when you are in/on a vehicle. You also need to stay 1000ft from school property.
Make sure you read the laws before hand.
-sent from my phone, please excuse any errors.