Use pinking shears, if you are able to handle them. Trim off only the very edge of your seam. Be very careful.
Edge stitching
After the plain seam is pressed open, machine stitch along each edge of the seam. This is a stronger finish than the pinked edge.
Selvage
The selvage may be left as a seam finish on your skirt. Clip the selvage every 2 or 3 inches. The clip should be no deeper than ⅛ inch. A deeper cut will ruin the seam.
Your seams are not complete until you have pressed them. Remember, always press a seam before joining it to another seam.
Make a fitted facing
Edges that cannot be hemmed may be finished with either bias or fitted facings. Facings can be turned to the right or wrong side of an article. They may be part of the decoration if used on the right side.