I think you are missing a point or two. I know you're new here, so you haven't seen all of the "I just got my first DSLR today and I'm shooting a wedding tomorrow. What settings should I use?" threads. Wedding photography is a discipline that requires a great deal of experience and knowledge to pull off. It can also be very physically and mentally challenging. It also requires a great deal of equipment to pull off successfully. I looked at the pics in your other thread, and with respect, I don't feel you should be shooting a wedding. With that said, if the people you're shooting the wedding for understand where you're at as far as skill level, and maybe they don't have the several $K to spend on a pro, at the very least, you'll provide them with a photographic record of the day. If ​their expectations are higher than that, do as John suggested and politely bow out.