Hey Stephanie,
Thanks for reaching out! Let me help you with your question.
From the top of my head I see 2 ways to do this.
1. Overriding your single event template to show a sidebar with the Events List widget.
Here are some knowledgebase articles that can help you started on this route:
https://theeventscalendar.com/knowledgebase/themers-guide/
https://theeventscalendar.com/knowledgebase/template-overview/
2. Your theme might allow you use a page template for the events where you can add a widget to the sidebar. Then add the Events List widget to that sidebar.
Let me know if this is useful or I can help with anything else.
Cheers,
Andras