If you have some rope, get about 12-15 feet of it. Double it up and put it around your waist, pulling the ends through the loop. Knot the rope so that it is tight, but not too tight, then make sure that the ends of the rope are in the middle of your back. Pull the rope down between your ass cheeks and tie a knot right where you anus is. Pull the rope up through your legs and between your pussy lips, tying another knot so that it sits right over your clit. Now tie the rope off at your waist, making sure that the crotch rope is nice and tight.
Do this in the morning and wear this under your clothes for the day - no panties over the harness. When you get home in the evening, take the harness off and edge once for every hour you wore it. Pictures of you wearing the harness and of your pussy / clit just after you take it off would be nice, if you are willing.