Edit Events+ RSVP/ Event Listings Page

Hello. I am working on a site that would let people RSVP for pickup basketball games. The functionality of the RSVP and calendar is great, however the front end is kinda terrible (no offense!) . I tried looking around to see what files to change, but could find none. How do I go about editing the template for a new event, and would I be able to use something like Gravity forms perhaps to make this process simpler. Thank you