I did make one MAJOR mistake — I didn’t think about whether the fabric was thin enough that it would need lining to avoid showing the details of my bra. Reader, it WAS that thin. Oops.
Normally, you would cut the lining at the same time as the fabric and sew it together, but you *can* attach a lining after-the fact, so that’s what I did.
Slightly annoying to find I had an extra hour of work when I thought I was close to done, but cutting the lining fabric, sewing darts, etc. went pretty fast, esp. since I didn’t need to do the sleeves or the midriff.