Hi - welcome to the site. It's hard to say, since HRT effects everyone differently - some areas might change more than others. Generally though you will usually find a loss in some muscle bulk, combined with fat deposits growing in areas they haven't before will change your overall body shape. It does take between 18-24 months for the full effect though so don't expect anything immediately. In the meantime you may find that posture, especially around the shoulders, can really change the way you look.