
The schedule isn't very clear but the groups seem to simply be listed in numerical order, there may be 10 rings for all I know with all groups starting at 11, so either get there for 11 or call the secretary.
Did you order a catalogue? There will be a table somewhere near the main entrance with someone giving out catalogues, go here first to collect your catalogue and ask these people what ring you are in and where it is. Find your ring, for most shows it is better to take your own folding chair/camp seat and blanket for the dog to sit on, find a space to put these down near your ring but not blocking walkways. Find the toilets and the coffee stall then chat to other folk while waiting for your class.
Do you have a ringclip? A clip or armband to hold your number? If not take a safety pin. You wait for your class to be called then go into the ring and the steward there will give you a number, no need to book in.
Have fun