Hi Sammi,
Thanks so much for reaching out!
As a first step, I’d recommend playing around with the stylesheets and page templates that you have set up. These determine how much of your calendar styling is pulled from your theme, which definitely affects how your calendar pages look:
https://theeventscalendar.com/knowledgebase/stylesheets-and-page-templates/
If you do decide to change to a different WordPress theme, your events calendar will stay intact and your events will transfer as well.
Let me know how it goes and if you have any other questions on this topic!
Thanks,
Jaime