After your Events are defined you can start working on your race schedule. In order to do this, you must have some idea of how many people are entering each event in order to determine how many races there will be. You can estimate this number for now in order to create your preliminary schedule. Later, after you have the Entries data and thus have an exact count, you can easily go back and modify the schedule if necessary.
Select the Schedule tab in the Meet Setup tab to work on your schedule. Using that tab you can select one Event at a time, enter the estimated number of Entries for that Event, and create the Races for that many entries. Once all of the Races are created, you can assign numbers to each Race, order them by race number, and assign a date and time for each Race. For details on how to do this, see the section for the Schedule tab.