If you are using clothifying part of a conforming outfit, you can actually skip some of that.

Pose your figure at frame 1. Go to the cloth room and start a new simulation. Set it to drape for 20-30 frames. Set the cloth simulation to 1 frame. Select the skirt part (usuaally the Hip) and hit clothify. Set up collisions to collide only against the legs (will save some time when it comes to the simulation). Be sure to uncheck "start draping from zero". Run the simulation. Will drape for the frame and simulate for one frame. The drape should be enough for what you want.

If I left anything out, refer to the excellent tutorial above!

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