You will be absolutely fine, Full face is really a good idea whatever level of DH riding you plan to do, armour is worth wearing if you have it…
CwmDown is probably one of the best uplift services in the UK, proper bike trailers and a couple of comfy transit vans, nothing like as agricultural as some I’ve seen…
You should get plenty of runs in a day.
Take it at your own pace especially the first couple of runs, learn the course at your own speed talk to other riders and watch what they do you can pick up an awful lot, they’re normally very friendly and you should get helpful tips if you get chatting..
The Red and Black runs ain’t that different and everything is either rollable or has a chicken run, your wheels need never leave the ground if you don’t want them to.
Most of all relax and have fun, if you’re not enjoying it then what’s the point?
It’s not half as scary as some of these Marys make out…