Ring Car Cam lights meaning?

I just got and installed the Ring Car Cam. Question 1 -- are there any lights besides the blue light to indicate the system is working? I usually drive with the interior cam privacy filter ON - which blocks the blue light. Question 2 -- is the big ring light on top of the unit ever supposed to come on or pressing it supposed to do anything? I'm already setup. Question 3 -- the OBD plug was flashing blue for about an hour on a long drive -- I can't see the OBD -- is there any readings on it or what the lights are supposed to indicate?