Doing a custom asterisk and FreePBX install on an unsupported platform with no Linux experience is deep magic. I’ve been doing this for years, and it’s still a daunting proposition. You might want to consider lowering your sights a little and maybe implement the Distro version on more common hardware.
The fact that you don’t even know how to use a copy command from the Linux prompt means that the rest of the even more complicated stuff might be out of your reach right now.