I think you're trying too hard and probably making yourself crooked.
Horses 'follow' weight. This is your strongest aid. Simply walk and experiment weighting your seatbones differently. Don't drop a hip, don't drop a shoulder, don't lean, just step into the stirrup slightly hard to weight the seatbone. The horse WILL follow.
To complete the turn, simply look in the direction you want to go. This will turn the eyes, the head, the shoulders and place slightly more weight onto the inside seatbone and the horse WILL turn.
The horse should move 'away' from the leg, either forward or laterally. The inside leg in the turn also creates bend. As you turn to look in your direction of travel and your eyes, head, and shoulders turn, and your inside seatbone becomes slightly weighted, you inside leg will naturally come into the horse's ribcage triggering the intercostals to contract and creating bend. Your outside leg slides back a hair to keep the haunches from escaping. Finally your outside rein controls the shoulders, the amount of bend, and tempo.