Knit the back piece first, start knitting the edge (upper and lower needles) about an inch and a half, start knitting plain stitches (you need to read a book to choose patterns for knitting flowers), knit until you have knitted 1 foot 2, start dividing the sleeves, first close 8-10 stitches, then reduce one stitch per round, reduce 3-5 stitches (adjust according to fatness and thinness), then continue knitting about 7 inches upwards; start knitting the front piece the same as the back piece, just add 10 stitches to 1/2 of the back piece, and then knit the other front piece with the same number of stitches. Note that the direction is opposite when dividing the sleeves.

After the clothes are knitted, start knitting the sleeves: first cast on 15-20 stitches, add one stitch on each side of each row, when the number of stitches is about 85-90, cast on 10 stitches to connect the knitted pieces into a tube, reduce stitches every 5 rows, and reduce stitches every 10 rows until the elbows, knit until the sleeves are one inch short of the length, then knit the upper and lower stitches (edges), and close the edges.

Finally, sew the knitted pieces with sweater needles and you're done. I wish you success!