Is this correct:
I can use this one 20 amp circuit for everything inside this one bathroom (one outlet, 2 lights, one fan) as long as nothing else is on that circuit.
The outlet near the sink must be GFCI of course. I will run the feed from the breaker to this outlet, and then I can make the other fixtures (lights, fan) downstream from this one GFCI outlet. This makes everything in the bathroom GFCI.