A couple ideas......
HTC receives a newbie signing up for an account. They take an email address, and with it they send a packet. In this packet they could send a manual, made up with links to the trainers site. The manual could be just a basic thing so as to NOT overwhelm the newbi. How to log in, set up your mouse/stick, how to set up views, the commands sheet, how to set up your mic, and how to view films.
At the end, an index linking to films of basic maneuvers that are posted at the trainers site.
As for the trainers, seeing that they are all volunteers its hard to "tie" them up to a schedule. Maybe an assistant trainer setup might help. Have the trainers train a few assistants in basic things say and get them qualified in certain things. If you have 4-5 people qualified to teach a basic course in picking a plane, getting it started, take off, a couple turns then land. You could have a course every other night. Same with BFM, or sets of ACMs. With 4-5 assistants trained in each it wouldn't be as much of a burden to fill the time slots. The trainers could then be freed up for the more advanced 1 on 1 training some might want.
The info is there, its just not advertised that much. A lot of people did a lot of work on the Wiki pages, but I'll bet they aren't accessed that much. Maybe a newsletter with game tips, break downs of moves, tactics, how to take a base WITH OUT NOE

ok maybe that last one is a bit much, but they have to get the word out there that these resources are available.
Maybe HTC can set up a MOD asking if people would be interested in giving up their email address to be added to a news letter list, see how many would be interested.