Is it heavy enough that you'd wear a pair of trousers made out of it to do yard work or the like? If so, it's probably heavy enough
Yes, in fact I have quite a few pairs of hiking p@nts made out of the same material.

What don't you understand about your machine? And what's the make and model?
Uhm, everything! I read my instruction manual. Doggone stereo intructions is the way it reads. It is a Singer Quick Fix complete. It was a gift at Christmas.