There are two PDF's on the Kajabi aka My Local Agency website that walk you through the entire process of creating a Txtria account, instructions within Lead Engage for Txtria, and releasing Txtria numbers. You can find them in Instant Client Challenge and 21 Jumpstart listed under the section Fulfillment Resources and they are titled "How To Set Up Landline Texting" and How To Release A Landline Number."
ICC: https://jason-bell.mykajabi.com/products/instant-client-challenge/categories/3832647/posts/13309121
https://jason-bell.mykajabi.com/products/instant-client-challenge/categories/3832647/posts/13309242
21 Jumpstart: https://jason-bell.mykajabi.com/products/21-jumpstart/categories/4499671/posts/15101992
https://jason-bell.mykajabi.com/products/21-jumpstart/categories/4499671/posts/15102033