I generally try not to put seams at the top of shoulders, but this particular pattern does, in fact, have a shoulder seam.
So, to start out, there are some ugly raw edges of the shoulders.
Because these straps are so tiny and narrow, I wasn’t able to easily clip corners, so I just turned everything under as-is and pressed the living heck out of it all.
Then, placing the insides together, whip the lining together. These stitches are going to take the bulk of the strain.
After the seam is whipped, I opened the seam up and press flat.
Then, stitch the top layer together, using bitty, pretty stitches. (Since these are actually going to be seen!)