You decide to start modest, but not too modest. You could make the small changes later.
You set the flashlight to a medium-pink setting and aim it at your feet. They immediately get smaller, and your tennis shoes become open-toed sandals. Your toenails are painted a simple red color.
You then bring the light up your legs, avoiding your junk for the time being. Your legs become slimmer, and you start to get shorter. Your jeans become tighter until they become skinny jeans. You notice that your legs are also cleanly shaven. Your butt becomes more rounded as well.
You then move the light to your torso. Your stomach feels smaller and you get even shorter. Your chest expands until you have full b-cup breasts, with a bra to match. Your t-shirt becomes a pink v-neck that reveals a small amount of cleavage. You then shine the light on your arms, which lose muscle and appear to be shaved. Your hands grow smaller as well.
You then close your eyes and shine the light on your head. When you open your eyes, you notice that you have a somewhat cute face (not drop dead gorgeous, but you would still date yourself), pierced ears with small pearl earrings, and straight, shoulder-length brown hair. You aren't wearing any noticeable make-up, but you somehow know that you have some at home.
All that's left is your junk, you shine the light at your currently hard penis, which immediately starts to shrink. You pull your pants down to examine your new vagina, and notice that your boxers have changed to plain white panties. Your vagina looks cleanly shaven, you touch the clit and immediately feel a sense of arousal. You pull your pants back up, put the flashlight in your pocket, and examine your work. You look like a completely normal girl: not ugly, but not super gorgeous your also about three inches shorter than you were before.
You next decide to...