Excellent job for your first wedding! On the image with the bride walking down the aisle, if you zoom in a little, you'll get rid of some of the non-essentials and keep the focus on the interesting content in the picture.
Sometimes it's good to have the extras in the picture, like in your last shot where the people are blowing bubbles. The basic rule is that if something is not essential to improving your photograph, try not to include it.