Another common problem with rookies is that they do not understand race strategy. Often if they are a 1+ laps down or about to be lapped they will still fight for positions at the same time ignoring or not understanding the meaning of the Blue Flag on the screen! LOL This is dangerous for both pilots. When I have found myself in this situation I will go on voicecomms and quickly and POLITELY explain the situation ("hey, I'm a lap ahead of you, no need for us to fight for position"). More often than not the other pilot will allow me to pass safely.
FWIW...Do you know of the F3 feature during the race? it will show you relative positions of cars around you - blue cars are lapped by you, red cars are laps ahead of you, white cars are on the same lap as you.
I am sure some other GTP/iRacing vets will be along to give you some more options!
good luck!