Hi,
Thanks for purchasing our plugins.
I can help out here. It sounds like you are getting on track with recurring events.
The Start and End Date should be for the first event in the recurrence. So if you have a weekly event on Monday the Start and End Date will be that first Monday. You are correct then the end on date is the final date of the event.
We have a guide here that explains recurring events in detail:
https://theeventscalendar.com/knowledgebase/pro-recurring-events/
Also, when you create a recurring event it has to be a new event, you cannot create a recurring event from a published event.
Let me know if you have any follow up questions.
Thanks