I don't have a step-by-step for you, but I'll relate what pictures I took and my experience with the build.
It was a hasty build (only a couple of hours) and I have arthritis and fat fingers so unless you build her drunk, you should get better results than I.
Knowing the primary hull was going to make or break the build, I actually started there. As written, the template instructs you to cut out the two pieces (front and back) of the primary hull and join them by overlapping the edges.
There are two problems with this approach: first, you wind up bending and warping the cardstock where it's
not cut in order to get the edges to overlap.
Second (and more damaging to the quality of your results) is that the template is low-res. There are quite a few tiny cuts and tucks needed to get the proper shape. Miss those, and your hull comes out warped:
Note the overlaps and distortions in the hull (particularly the bulge at the very bottom).
I wasn't at all happy with the result and nearly gave up on the model.