How do I create a new trigger for Booqable?

Hi gurus! I run a mobile equipment hire service and I’m wanting to set up a new Zap to send the delivery guy a text message when a new webshop order is made in Booqable. At the moment, Booqable has several automated triggers/actions set up, including a new order or reservation, but I only want to send a message to my driver for webshop orders (he gets the other kinds via a different system but sometimes misses webshop ones). I have sorted the texting part of the zap but am a bit stuck on creating the specific trigger for Booqable events. Any help from the brains trust? Thanks!