Hi,
Thanks for using the Events Calendar. I can help point you in the right direction on this.
To make changes to any of our views please review our Themer’s Guide:
https://theeventscalendar.com/knowledgebase/themers-guide/
That will show you how to move and edit event templates in your theme so the changes to do not get overwritten.
As for showing the first date of the first coming event we do not have a feature to do that, so you would have to come up with something on your own.
We can answer questions about customizations such as this, but it beyond the support we can provide to do much more then that.
Let me know if you have any follow up questions.
Thanks