Use your drifter in 2-7 knots of true breeze. Never try and go hard to windward, always crack off the helm (and trim!) a bit so you sail no higher than 50 degrees true. While you can pole it out and go downwind, if you have nowhere in particular to go the most fun is to close reach around, which will keep the apparent wind higher than true and that helps keep the sail full. And yes its fine to try it with your regular headsail sheets.