The PPWR runs to 71 articles and not one of them tells you what to do first. Pick what your company actually is, and watch your own path draw itself — every step, what each one needs from you, and the documents the toolkit writes so you do not have to.
The duties are not the same for everyone, so the chart does not pretend they are. Choose a role and it draws only your path. Click any step to see, in plain words, what it does and what it needs.
Every box in that chart is a duty someone has to work out, a supplier who has to be chased, or a document that has to be written from scratch. The toolkit turns the whole chain into one guided flow, and writes the documents from the answers you already gave it.
Every step in the chart is a screen in the app, in the order you just watched, with the paperwork already filled in from what you typed. Start with one product and watch the fields turn green.