Crocheted sweaters are stiff and awkward-fitting.
Sweaters need to be knitted.
(Anyway, both generally require opposable thumbs...)
https://www.scifacts.net/human/opposable-thumbs/
I've been into cables lately (put one on a pair of arm warmers) so I like that detail, but what really intrigued me was the 'background' stitch .... what is it? It's not a "moss" stitch, but looked similar. So I searched 'moss stitch variation' and lucked on it right away. It's a vintage stitch, the Irish Moss Stitch.
I knitted a pair of arm warmers using this stitch & they worked up beautifully. There is texture to the stitch so the arm warmers will be thicker and ... ta da! .... 'warmer' than the usual stockinette stitch. I'm currently knitting up another pair for a March birthday present.
Irish Moss Stitch Links:
Irish Moss Stitch Knitting Pattern for Beginners
The pattern is a very simple 4 row repeat & you'll get lots of practice with knits/purls. I hate K1, P1, but it's been good for improving my knitting speed.
BTW, she has a stitch book that can be ordered (Amazon has it, too) that I think I'll end up getting. I'm always looking for new stitch patterns & while I have a couple of books on crochet stitches, I have none for knitting.