well the initial training for DEL/GND is supposed to also familiarize you with the VRC interface. As you move up in ranks/duties, more features will be explained to you.
At least, that's how it works/worked in my sector (KZSE).
If you have any VRC questions, feel free to ask me here or via PM/email, I will try to help out. I'm not an instructor or mentor, but I am a C1 controller, so I use VRC fairly often ;)
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Scott M. Stone
WWA1712 - Cat-III - Director of Aircraft
VATSIM 1018857 - C1 Controller - KZSE
Private Pilot - ASEL + Complex + IFR (almost)