Once you start throwing a shepherd sling, you will never want to stop. The key is to get started. The reason I started making shepherd slings is to help make the Scriptures come alive at The Great Passion Play. It turned into much more than that!
Get into a community
A good friend of mine made by first shepherd sling, and from there, I just started experimenting. Slinging.org was very helpful as well. :) In fact, slinging.org is a great place to connect and get your questions answered about all things related to slinging!