You can find this web site as well as supporting 3D model files and information here:
There is a FaceBook page where you can comment and connect with other people interested in small disc golf:
https://www.facebook.com/smdiscgolf
Here is a link to a playlist of videos about Small Disc Golf:
https://www.youtube.com/playlist?list=PL_hvQotzDwRReI0Vxud4ZUQLRkxAmfWri
Here is a link to the Professional Disc Golf association, with which there is no association or business relationship:
Small Disc Golf rules are informed by and embrace the publicly available PDGA rules. Here is a link directly to the PDGA rules: