The manual is still on the bench.

We are writing it now: sketches, parts, assemblies, drawings, and supports. It goes up here when it is good enough to save you time, not before.

Until then, you are not on your own:

• Learn panel. The app walks you through your first part, step by step.
• Templates. Open one from the home screen and poke at its variables. Most of what you need is in there.
• Discord. Ask there. A person answers, usually the one who wrote the tool.