I have used the RF24 modules quite a bit and really do like them, but there is a new kid on the block that may be worth your time to look into. It is the HC-12 modules. They have the same or better range as rf24, no packet size limit, easier 2 way communication, only need 2 pins and a lot less finicky setup. They are a serial port pass through.
The serial input basics tutorial will show how to do robust serial communication and how to create, transmit, receive and parse data packets.