Hey Harold,
Right and choosing yarn can be tricky when you're new, I actually remember messing up my first scarf with something that fell apart after one wash. Stick to acrylic or wool-acrylic mixes for durability; they hold up well against unraveling and keep you warm in the cold. Avoid anything too fuzzy at first, it hides mistakes but can pill easily.
For winter, thicker yarns knit up faster, which is nice if you're impatient like me. I tried a few and yeah, the ones with tighter twists don't come undone as quick. Experiment a bit, but start simple.
Quick note — I've used that unit on my fine, frizz-prone hair and agree the consistent temp keeps things smooth without sizzling. The caveat for me is the fixed 365°F can feel a bit much on my fragile bangs, so I have to keep passes extra quick and use tiny sections. The 1-inch plates are great for control at the roots, but on longer lengths it does take more time than wider plates to get everything sleek. If you go with it, try the comb-chase method and one-pass sections to minimize overworking the ends.
