You have to get a CDL if you are going to work in Freight. The Days of being well paid to be just a Dock worker, are coming to an end. Companies want workers who can do multiple jobs. Start with learning to be a Yard Spotter, Most Companies will let you learn on their equipment as long as you do it on your own time. If your unemployed you might be able to get your state to get you free training from a Driving School.