Sunfish Boat For Sale Minnesota Do I Need Any Sort Of License To Sail My Own Sunfish In Washington D.C/Virginia?

Do i need any sort of license to sail my own sunfish in Washington D.C/Virginia? - sunfish boat for sale minnesota

I have a Sunfish sailboat and took a one-week course to navigate for them. I live in Washington DC, but put the boat in a port called Washington Sailing Marina
Do I need a kind of license for my own boat (not sailing rentals) in the Potomac?