My first tip is this; you will be crossing the Appalachian Mountains at some point, and if you do it down around Georgia, it will be a snap. As you go further North, the mountains become more prominent, and there will be long grades both up and down.
I assume you have a Ford V10 engine and 5-speed transmission, so with your 30' and tow car, you should be OK.
Once you're over to the Wast side of the Appalachian mountains, I-95 is the main N-S route for most RV campers, with the occasional foray either to the beach areas or what I call the "rolling hill" areas. There are lots of great places to visit without worrying about driving and towing over mountains.
As for myself, I have found that the safest and most enjoyable way to drive an RV is; stay in the right lane and stay 5-mph below the speed limit. Everyone passes you, so you don't need to keep passing others, and just that 5-mph speed reduction will allow you to relax and enjoy the drive yourself, rather than feeling like you are negotiating a battlefield with the other cars.
As for Driving Schools, I'm not aware of what might be available in Texas. I would Google it.