A draft works on any loom that has the number of harnesses that the draft is designed for. Weavers all over the world, in incredibly diverse communities, that wanted to weave the design in a 4 shaft draft could, as long as they had a four shaft loom. However, mostly they weave by memory and don’t draw down their designs – they have them memorized!
If I were you, I’d work through the lessons that Jane has laid out for us, learning more and more about weaving as you move though the lessons. Jane eventually covers reading and creating drafts as you go along, but spending the time in learning to weave and the magic of colour and design in Plain Weave is well worth the journey. I’ve learned a lot from those first seasons and I’ve been weaving for years 😏