Welcome aboard Rex!
The descriptions of the various lifts are found in the rule book. Most competitions list the events that will be contested, unless the contest is a record day, where a person can attempt to break an existing record of any lift.
A postal meet usually contains 3 lifts, with the results mailed in (hence the name), compiled, and then put on the website. A postal meet can be held anywhere, provided that a USAWA official is present to judge the lifts.
Check the Member Clubs for locations in your area.
Hope this helps.