Intrastate runs and taxes

I'm getting started again as an owner operator but will be running (in FLA) under my own DOT#s. I will be a sole proprietor. I will be the driver, no employees. I will have one truck running intrastate only. I will be pulling the customer's trailers not mine. My question is; when I register for my DOT #s do I need to use my own name or can I use a company name? I was wanting a different name on the truck instead of "John Doe Trucking". I hope I made some sense.

Also, if anyone knows where I could get some good information on getting started as a sole proprietor, running just intrastate, would be appreciated.

Over and out,
Highway