No way to practice an efficient LST on a plant that is so little , LST a shortcut for Low Stress Training which is just a trick to say bending , so lst is stem bending , stem bending will promote secondaries growth and an even and flat cannopy if well done the light repartition will be better BUT to do it your plant need to be at least between 5 to 7 nodes tall or you'll gave to bend it each time she's gaining a new node