You can offer multiple courses using the same chapters and lessons as an introduction:Create a standalone course for the introduction and courses that build on it.Create Digistore24 products for introductory courses and subsequent courses.Configure the introductory product as an add-on that cannot be unselected for the subsequent course products.Buyers see the introductory and subsequent course after the purchase.See also:Chapters and lessons⧉ Create add-ons on Digistore24 (Digistore24 help)