I find your candid shot quite good specially inside the church. However on the reception background lighting is not enough and some detail is loss already. While for group shot and traditional shot need further practice its either too much space or too much crowded inside the picture frame. Some of the subject face is too stiff looking. Remember to tell them to relax, try to be funny sometimes.
Wedding photography is a different playing field its comprises of multiple photography discipline try to combine all the technique you learn by trial and error in able to master the technique. The best way to master it is to shoot weekly. Good luck and enjoy this new field.