Spring for the price of a professional photographer. Call a modeling agency you are targeting and ask for references and contact numbers of shooters with whom they normally work. Have you hair and makeup done at a salon before your photo shoot. Have the photo shoot. Once you get the proofs back from the photographer, pick a variety, including full body, profile, and head shots. Vary the backgrounds and outfits to avoid giving the impression you were in one location with a limited wardrobe.