Sorry to ask off topic @DDknightLEI but I just saw we’re both noobs, we both have r5c, and you are ahead of me.
My r5c won’t even boot to the sd card, it just boots straight into the default FriendlyWRT.
How did you get it to boot from the sd card? I followed DietPi flashing instructions.
Is there something else to do?
(My post is at Nanopi R5C seems to ignore SD Card in boot order )