My 2 cents
call 231-UGOTPBS tell the trainers you are new and would like a brief, don't do it on the last day of the bid being open they are too busy for a long brief, use the middle of the window opening when they are slower.
Or do the online chat on Prefbid.com for specific questions.
Remember they are only staffed during the bidding window and the award window each month.
Its free and some of your dues dollars helps pay for it so use it, that is my advice.
FYI, they are adding slowly a thing called Probids where the most experienced trainers are doing the bids for newer people like bidnav for free , its not in all fleets yet not sure what ones.
30West