To enroll a new foster parent in your foster program, go to the Processing > Attributes tab on their person record and select the "Willing Foster" attribute. You can set their initial preferences, capacity, and blackout dates. The foster parent will receive an email with a link to update their profile anytime.
For more information regarding the foster portal from a foster's point of view, take a look at this article.
You can also access their foster profile from their Animals tab:
Foster Finder
You can then use the Foster Finder feature to search for and contact all of the available fosters that fit your needs at any given time. Learn more here: How does the Foster Finder work?