Knitting a chunky cardigan for spring

Yarn consumption 1.5 kg.
Yarn: wool, half-wool 50g * 50m in two strands.

Knitting instructions:

Cast on 70 stitches with size 10 needles, knit 8 rows of ribbing, switch to size 15 needles, knit approximately 35 rows (about 50cm), then divide into the right front (15 stitches), back (40 stitches), left front (15 stitches) and knit each part separately for another 20 rows. Sew the shoulder seams.
Sleeve: cast on 25 stitches for ribbing, knit 8 rows, evenly increase 11-12 stitches and continue knitting with size 15 needles, increasing 1 stitch on both sides every 6th row for expansion until there are 44-45 stitches total, then continue knitting straight (the total height of the sleeve should be 42-45 cm), bind off the stitches and sew in the sleeves.
Along the edge of the left front, the neckline of the back (10 stitches), and the edge of the left front, cast on approximately 150-160 stitches and knit ribbing with size 8 needles, bind off the stitches on the front side (so that the braid runs on the front side).
For size S, approximately 13 35(37) 13 stitches are cast on.