It does not matter if he's a newbie or not. He joined WF since he has some shit. Grindstone has helped a lot of newbies in past and many of them are doing really well now.
So, yes he surely helps newbies. Make sure to ask him politely.
You are welcome. When I contacted Grindstone for EWA approval he did not reply on time as he was busy with some other shit. I got his attention after my 3rd or 4th PM though. He is a cool guy and sometimes he may be busy. Just remind him again in case you don't get the reply in 1-2 days!