Not great but not bad considering the huge mistake I made early on.
What I should have done: seam-ripped and cut the lining very carefully.
What I did: cut straight up the back, just to see what it would look like, without any planning whatsoever. I was just going to throw it out anyway, and did not foresee myself liking the look of it as much as I did.
Oh well. This was a great learning experience + much needed sewing practice. The next one should turn out a lot better.