will me myself have CDL B x but I need A for my future.

There are a number of trucking schools that will help you get your CDL class A license. See what is available in your area. Many online resources will help you with what is required and even let you take a practice test.

Do you have a company in mind that you would like to work for? They should be able to help you as well whether you would be a company driver or lease with them as an owner operator. They may even offer some type of reimbursement for your training or train you at their company headquarters.

It cost my grandson a few thousand dollars to learn to drive a big rig, complete the testing, and get his CDL.

I know cash is hard to come by sometimes, but most truck driving schools do offer student loans, so why not go that route?