Getting newbies up to speed depends in part of the maturity of the beginner. I see a lot of one timers who shoot and then never come back. On the other hand, we had a USAF neuro-ophthalmologist who wanted some practice beyond his brief service intro. He learned quickly and became part of our group. Same with a TSA agent.
It's attitudinal and willing to learn. We were very gentle with new shooters and shepherded them through the stages. Blatant disregard got them DQ'ed.
One thing that is a big negative, is a guy who is new and wants to 'win'. Won't tape and yaks with his buddies instead. A newbie who tapes is a good sign.
One newbie, I still recall that particularly annoyed me was a guy who bitched when some of us older shooters did not kneel. We have serious and documented screwed up knees. Want my MRIs? Even with us taking the penalty - bitch, bitch.