Adafruit Feather m0 rfm69 coding

Hi guys, so I'm trying to use the adafruit Feather m0 rfm69, and I have absolutely no clue how the code wokrs. I've spent like 3 hours going through various webs and forums, but alll I find is a small guide on what library to install when using this and a sample code I just dont understand(for example the adafruit web, which tells you to install the Radiohead library and shows you the raw sample codes). I have already tested the board with some sample codes, but I need to transfer some data from other sensors in the same code an I just dont know how to do it. I obviously won't ask you to give me a private class on how to code, just if you perhaps know a site that actually shows you how to do the code yourself, I'd really appreciate it.

How about this?
https://learn.sparkfun.com/tutorials/rfm69hcw-hookup-guide/all

Pay careful attention to the code commenting, that will give you big clues as to what it's doing!

Kind regards,

Zeb