I've always had the ambition to share my creations with the community free of charge. I've learned from free advice and created with free software. With more experience, the projects grow in size and complexity. Prototyping becomes expensive, and development extremely time consuming.
I've stuck with giving away everything for free, but I don't include instructions with my projects. Those are available for purchase. The instructional videos also include some insight into design choices, electronics and coding. So they might learn you something new.
That being said; these builds can of course be done without instructions, and I'm happy if you want to give it a try! The projects files for Fusion 360 are overly detailed, and YouTube/Google are packed with instructions on programming microcontrollers.