The only thing you should be unfamiliar with is the Launcher. You are used to using TouchWiz. I recommend you putting that back on your phone before going through the trouble of flashing back to stock.
The Launcher is the graphical user interface you boot into and use on your phone. It is your home screen, app drawer, etc. The benefits of VB are on the backend that you don't see but rather experience with your phone running smoother and faster, battery lasting longer, apps running better, etc.
This is why I am trying to convince you to put TouchWiz on back on your phone as you are familiar with it. There are a ton of Launchers to use. TouchWiz was made by Samsung and comes with the phone.
I will help you get it back on your phone if you have faith I know what I am talking about. If not, as I said before - follow the guide in the second link in my signature to cleanly flash back to stock.