for a visual demontstration:

https://i.imgur.com/EF1UeYh.png

A non VIP can train 1 race, 1 class and 1 profession

while a VIP could train 2 of each instead [but not within the same sub line]

e.g. a vip could train to be a mage and a fighter - but *not* a mage and arcane [as that would be 'double dipping' in the same sphere] etc

even a non vip could end up training 'mage' for 4 different class options - its up to them when they want to then progress to be more specalised e.g. to arcane - which still gives 2 class options at once to play

also training is only active when you are in a body of that race and class too in terms of the benefits being active or not