After reading and/or watching the tutorials on my Pinterest board, I took a few ideas, tweaked a few things, and got to work. First thing: lots of seam ripping to open the center seam.
I don't like that look. Instead, I made a small cut on each side of the center seam and sewed it under. So, from this:
|The long seam piece was cut down once it was turned under and sewn in.
I serged all the inside edges, turned up a half an inch twice for the hem, and it was finished. I'm looking forward to try it again on some jeans next week.