In my opinion it would be nice to have an Hall of novice dedicated to PvP,
let me explain my suggestion:

Before you can enter in any kind of PvP content for the 1st time you will have to complete the Basic stage of the PvP Hall of novice.

It will briefly explain for your role what should you do generally, what should you be aware of, how to win a match and what's the difference between PvP and PvE.


For example,
as Healer you will have 3 NPC chasing you and you have to survive for x mins,
then you will have a party to heal for x min.

As DPS will be required to set a burst, to follow calls and so on...
As Tank they will explain how tu support a burst, negate one or help you healer,
and most of all HOW TO NOT PICK UP 400 medals

and in the last training you will experience a simulation of a 4vs4 match.

I know it could be odd because pvp involves to predict how the other will act, but atleast this will give totally unaware people a theoric knowledge of it and about the mechanics of Matches and Frontlines.
(and please make it synced at ilv 150)

After I would like to see an harder version of it, where you can simulate harder matches with NPC opponent that will time their burst together, give calls, have a reactive opponent healer and so on,
but I know this will require a lot of effort and a strong AI to implement it x)