I agree that you need to practice turns and backing in a large parking lot before you hit the road. The road is never a good place to learn. I had my wife driving out 19,000#, 40' 5er in a church parking lot on several Saturdays until she felt comfortable to get on a street with it. She passed her Texas class A exempt license with no problems.
I also do not see the purpose of changing to a GooseBox. If you are after a clean bed get the B&W companion slider. Truckers do not use a ball hitch for their rigs. They use a 5th wheel hitch.
Ken
Amateur Radio Operator.
2023 Cougar 22MLS, toted with a 2022, F150, 3.5L EcoBoost, Crewcab, Max Tow, FORMER Full Time RVer. Travel with a standard schnauzer and a Timneh African Gray parrot