Learning Path FreeRadius

[Uchenna Nebedum]

Good Day all,  With my recent venture into setting up a RADIUS server using
freeRadius. i have discovered there's a lot i don't know about the
capabilities and setup of freeRadius, Please can anyone point me in the
direction of useful learning material on more advanced setup like the setup
of realms, unlang and the likes and also materials on scaling too. I have
read the beginners installation guide.  Please any help would be greatly
appreciated.

Best Regards
Uchenna Nebedum