I think it's very good for a first timer.... correct me if i'm wrong, i think the motif of the wedding is classical, because i saw the tires of the wedding car and you like the image to be like the 40's or 50's theme. If that's what your clients want then the grain and matte finished will be perfect in addition to the B&W making the shot looks old. Sometime when you are earning from photography, specially in weddings, what the clients wants always the one we need to follow. One photographer said in an article that " Amateurs are lucky because in every click of a shutter you fells great once you capture a good shot, but once you become professional and works to a company even your greatest shot sometimes not enough to the expectation of a client and they sometimes asked you to work on things you don't want to shoot.". So do what you think will make you & your client happy even others don't want or thinks that you could have done more better...... well this was your first wedding job later you will be the one criticizing your own work, that's is what we call learning.