They need to have a function in this game called:
Squire
A new player, who is gen 0, can request vassalage. They also put a note saying what type of class they want to be.
They go into a big pool, and all the other players above gen 1 can accept them as a squire.
What this does then is it opens up a direct link to an experienced player / mentor, they can trade between eachother, as well as schedule time on duel server ect ect.
This option needs to pop up once a new player has hit level 20, and should be hinted at when they first go onto the character page.
I honestly think something like this will help introduce new players, and build the community.
EDIT: Maybe even incentivise this by making the "Knight" receive 10% of the gold the new player generates until they retire (as a bonus, not taken from the new player) as well as a 50k gold bonus for when the new player retires for the first time.
EDIT2: For the sake of having enough time with a proper mentor, I think maybe gens 0-3 would be appropriate, with degrading rewards.