Mosaic sweater progress

I have finished knitting the body of the mosaic sweater.


Now to secure the steeks using a crochet stitch and cut them so that I can start the sleeves. I am deciding whether I should knit the sleeves then sew them in, or whether I should pick up stitches and knit down. I do not have enough experience to know how or if it will make a difference in the fit of the sweater. My preference is to pick up stitches , do some short rows to shape the sleeve cap, and knit down. I have a little bit of time to decide while I look for yarn to use for the crochet stitch in the steeks.