I have set up an XGN server for people to try ACC, with the idea of having an in-between season fun run or two. The track is set to Brands Hatch.
To find the server, search for XGN ACC. It has the usual password.
The server is set up with day time prac, qual and race sessions, followed by night qual and race. There is a fairly small chance of rain, but it's unlikely (weather is random, within certain parameters, in ACC). Make sure you know how to turn your lights and wipers on.
If you jump on the server, you can type "/admin theusualpassword" into the chat box to become an admin, and then "/next" to go to the next session (you might have to wait a few seconds for the session to change).
Each race is a 30 min sprint with no pit stops. The race starts in a shortened formation lap (i.e. starting just before the last corner). You need to stay in double line formation until the green flag, at a speed of 70 kmh.
The optimal tyre pressure is between 27 and 28 PSI for the slicks (and about 30 for the wets). Most people opt for something close to 28. Very roughly, you need to add 0.1 PSI for every 1° it gets colder.