Help with Eventbrite API?

I am working with this theme for a client website, and they rely heavily on Eventbrite for monthly gatherings.

The client really likes the look of this theme, and none of the eventbrite-optimized themes will suit.

Right now, this theme is not “eventbrite-optimized”. The eventbrite part really breaks the layout and looks ugly. Customizing a child theme to work well seems to be beyond my coding skills (all of the examples have really differently structured function.php and index.php files)

DEV site is behind a password so hard to show an example.

Anyone modified this theme to be eventbrite-optimized?

Thanks in advance,
Dunrie