New knitter neckline query

hi = hope someone can help - this is my first knit, a cardigan for my daughter and i’m stuckon the neckline. The instructions are as follows and I just don’t understand…

Join shoulder seams (do I sew these together or just pin?)
with rs facing pick up and knit 16 sts evenly along right side of neck, 18 sts from 20 sts cast off at back of neck and 16 sts evenly along left side of neck. 50 sts.
knit 2 rows
cast off knit ways

no matter how many times i read it, it doesn’ t make sense! :??

Thanks

You either sew the shoulders together or knit them in a three-needle bind off if they are ‘live’ stitches. Then, once that’s done you pick up stitches up the right side of the sweater, across the back and down the left side to make the color.

If you don’t know how to pick up stitches there is video
here.

that’s really useful, thank you