i construct my cardigans like this! i crochet the sleeves straight on, so i’ll only have to sew the sides and under the sleeves together :) then i can add the ribbing!
this way also doesn’t leave shoulder seams. it’s very adaptable to many stitches and leaves the freedom for any designs!
also drew on some arrows to demonstrate the crocheting direction :)
you start the body from the circled corner and the sleeves later on from the triangles :3
hope this helps! i love this way of making cardigans, i hate sewing lmao.