[Cdnone1]

Hi
If you can cut the top !/3 of the frame off most of your pictures that should give you an idea of your composition. We call it giving them a hair cut.
Though I don't shoot weddings or even stills for a living I have been shooting images (motion) for a living for the last 22 years. Images with humanity (people) in them are all about the people. Period. Your candid shots are great because they are showing the emotions and experiences of the moment. Concentrate on that. People love to see themselves and friends in shots, not what's behind them. Let your eye find what you really want to show and focus the frame, lighting, composition and your energy on capturing that. Don't be afraid to ask people to move for you so you can get a better shot. The moment will end but people will re-live it through your images years from now.
Once you start capturing the energy of the moment through the peoples eyes and expressions you can start worrying about you technical skills.
Your just a little to far away to be part of the moment right now. Get closer, with both your lens and yourself. Once you establish (early) that your a part of the event people will not even notice you.
Keep it up though, just wanting to do this shows you have what it takes.
Steve