To turn off the camera shutter sound, go to settings and tap on the ringtones+sounds. You get a screen as shown below. When you scroll down you could see the options for ‘Play a sound for’. Uncheck the Camera shutter option so that it will not make any sound when you take a photo. It has also got other options where you can mute the sounds for reminders, key press, and lock and unlock.
Here is the step on how to share the photos that you have taken through your phone. Open the photo that you have shot, press and hold the photo or tap the three dotted lines at the bottom of the screen. It shows the options like, share, edit delete, add to favorites, set as lock screen and save to SkyDrive.