Roman the amount of experience depends mostly on what you're driving. A standard class c license minimal experience is required, but a clean driving record is what makes the difference. However a class a (big trucks) 3-5 yrs is usual, plus driving record and passing a medical are required. Some trucking companies will hire you on, send you to their training school and then put you on the road. Good luck in your search for employment

Any where between 6 months too a year.

Not really much you just got to be able to drive be focused multitask and a good communicator