It looks pretty simple once you join the first section to the second, the you have a square to attach to other star squares. If you look at the sections, you are taking your diamonds cut from he stips, sewing them together for a four patch, adding the side triangle and then adding the next triangle to the other side. If you break down the square in the two sections visually, you can see how they all go together with no Y seams. There are only three pages of instruction in the PDF, are you missing one of the pages? If not, you have all of her instructions. Best wishes