Best place to start is with the clubs Q+A https://clubplay.net/club-play-questions/
When you arrive if you let the staff know it is your first time, someone will show you round the club and go over all the information you will need for the night.
The main three things to keep in mind is, there are no gaurentee of any play, always ask before getting involved in a scene that may be going on and always no means no :)
Pick the event you fancy the most and ask to be put on the guest list and have a great night 
