Onboarding in Freshservice

The Onboarding module offers some nice features such as build kits with pre-fill capabilities for additional items.  However, I’m frustrated that I cannot create a business rule to apply to the Onboarding form.  For example, if we want to require that Onboarding requests include the start date which must be at least 10 business days out, I cannot enforce that with a business rule.  However, I have recently noticed something new in the automators...now we can build expressions.  Are there any videos yet available that demonstrate how to build an expression in a workflow automator?