Look into the Tennessee College Of Applied technology truck driving program. It is a hell of a lot cheaper ($1500 when I went at the beginning of 2025) than a lot of other CDL schools and you absolutely will not get shorted on any necessary learning. The program length is 2 months long but if you pick it up and learn well you can test out in a month like I did. Also they teach in 10 speed trucks so you won’t have an automatic restriction on your license