Hello,
I will write my experience,
You can use a resistor divider but you will get only the voltage correct, but the current it will not enough ...
Another quick solution it is to use 2 diodes (1N4148) from 5V, it will works but not with the Max power of nrf24l01.
The win solution is to use L78L33ACZ 78L33 + 3.3V Voltage Regulator IC , it is not expensive and you can use the Max power 
Good luck 