If you can drive a car, you can drive a truck. If you can drive a truck, you can move cargo. So therefore, it follows that if you can move cargo and get paid for it, you can hire more trucks and more drivers. If it sounds simple, it's because it is. Until a better invention comes along, the best way to move goods from one place to another is on the back of a truck, and so there will always be a demand for services.
Companies actually advertise on the internet for haulage services all the time. You'll have to start off with low prices to attract business, but once you're established you can push those prices up, or sign exclusivity deals with businesses for a guaranteed rate. It will take time to grow, but when you have a fleet of vehicles and drivers, you'll be making big money on a daily basis.