I've started cutting the test cloth, while totally ignoring parts of the instructions. Was confused about how to cut the collar along the fold, because the instruction for that was at a curved side and had a closer look at the patterns. Turns out that some of the patterns should be put face down onto the cloth. However, I guess with this those old table cloths and bedsheets, that might be negligible. I just want to understand pattern and everything for now, which for me works best for lowkey half-assing the whole thing.
