WGI is by far my favorite track. You are going to love it. Having said that, you need to learn racing lines and braking zones before you start pushing hard. There are almost no run off areas, so you will need full concentration at all times, as this track is very very fast.
If you ask me what is the single most important thing to remember, i would say, DO NOT LIFT IN THE ESSES. You should be going flat out from T1 before the bus stop. That section is the favorite part for most drivers.
If you see me, come say hello and we will talk more