Custom Crafting Table (2023.3)

Hi everyone! I'm trying to make a crafting table (called the "Idea Constructor") that has 12 inputs and 1 output. I have the GUI and the Block Model sorted (I think), but unfortunately I do not know what else to do. I would prefer if I could make the recipes for it visually with the recipe editor, though, and I was wondering if someone could be kind enough to give me some of their time and experience and show me how to do this?

Please note I have watched a few tutorials, but due to my screen and my laptop's age I cannot make out the code, and frankly, I don't understand it anyway. Thank you in advance!