Was telling my wife that you were flying to Ca to pick up a truck. And here you have made the trip. As for the fun in the sleeper. I used to make that run from West to Tn Ca. Every week, and every 8 hours I was in the sleeper. Across Ar in I-40. I felt like a jumping jack. But on the bright side, never any issues of bed sores. Because you were never on one spot for longer then a minute or so.
Back in the 80's when all the trucks I was driving. Only had air ride on the seat. That trip was fun fun fun.
As for shifting, after a few trips. You will never even have to think about what gear. It should get where its natural. I had not driven a 10 speed in 8 years or more. But jumped in one and it was just like being at home. I would rather have a 13 or 18 speed.
Pete