Awe ok then..
1st study forum archives and obtain the CDL handbook.
Study for the written tests Commercial driver, Hazmat and Air brakes then take tests for learners permits (enables you to drive legal with a licensed driver)..
Then the options are open to renting a 24' box truck to practice basic driving and backing (preferably a truck with air brakes so as you can practice pre trip inspections as well).
For more info on the above see
Indiana CDL - DMV.ORG
There are training sites for CDL class "B" but I honestly can't remember where I happened to see them..
When Cyn and I started I already had a CDL so training for her was not a problem after she obtained a permit..
We were allowed the use of a truck and a position with Conway contingent on Cyn successfully completing her road test which she did (eventually

Just throwing a few ideas out there.
Good luck
Mike