There is a ton of FREE information on this very website that goes into the background and troubleshooting of gummies, that doesn’t cost $2000 for what is probably an excel spreadsheet and some poorly put together steps combined with Pacific Pectin’s troubleshooting tips.
This is where I based my recipe from: PDXCanna's pectin thread
Here’s another good thread too: Gummy recipe and SOP inside - #492 by DiNKLB3RG
This one too: Need gummy recipe (recipe inside)