IME, there isn't much reading - one follows sometimes sub-optimal pictures to determine the initial state for a step and the final outcome/exit criterion for the same.

Anyway; it's more fun to just look at the picture of what the final thing looks like and then deduce how the pieces go together.

Next step: don't even do that. Forget you ever saw the thing in the showroom. Just take the pieces and and figure out what they make. Then afterward, compare what you built to photos in the catalog.