Find all the principle easy - but who is ignorant of sewing, which is also not smart from the enclosed mini copied manual. Here, by considering the YouTube movie TwBuPfAXqdw be helped (call YOUTUBE and above this character string as a search string Enter). While it's not exactly the model, but the principle is shown slowly and clearly.
And one should not be fooled by the AMAZON-image. There are not 2 rolls of twine attached, but (at least for me) a spool of thread. The promised 20 meters I have not checked - but I'm assuming that this is a role on.