You may want to check with your insurance company. , as OSHA does require on the job training by the employer.

"Operators must be trained on the local conditions and hazards prior to operating powered industrial trucks in the workplace. So while the operator may be competent to operate the equipment itself, the employer is still responsible for training on work-related topics, as noted at 1910.178(l)(3)(ii)."

Check with your insurance company. Many of them supply training information.