I'm working on the sweater for my vintage doll's outfit. I haven't tried Kitchener stitch before, but I want to use it to join the shoulder seams. I watched a few videos online, and it seems there's a few different methods. The KH video was by far the best, and made it look easy, so that's the one I'm going with, for sure.
I'm sure I understand how to do the stitching, but for me (as always) the devil is in the details.

All the videos showed only the actual stitching, not the start and finish -
The sweater buttons down the back, and has simple cap sleeves.
So - I've knit the front, up to where the shoulder seams would be, then I guess I should put those stitches on stitch holders, cut the yarn and start knitting a back piece. When I get to the shoulder of the back piece, do I use the yarn that's still attached to the ball (on the back piece) to do the Kitchener stitch with? And what about the yarn end on the front piece, will I be able to just weave it into the seam?