Just like wiring a panel in your home, each circuit breaker has the potential for multiple items. Like all the bedroom outlets go on one breaker. As long as you don't exceed the total capacity of the breaker, you can plug something into each outlet and have them all on at the same time.
You could put all your lights on one CB and use individual switches, one for all your nav lights, one for your work lamps & as long as the total amps isn't over 7amps you are golden.
You don't have to use every breaker right away, you can group some similar loads on one and set up others on some of the remaining ones leaving a spare, or two, for future additions. I'd leave the power outlet stand alone so you can plug in almost anything up to 7 amps w/ out affecting anything else.