Have you BEEN to a wedding? your best bet may be to find a DJ who will let you shadow them or work for an established company to learn the ropes. There's a lot involved, but nothing super complicated. Too much to explain here.

To answer your questions, though - yes. take requests. your music library should be extensive - popular stuff across genres from the 1940s-present.

On the mike you will introduce the bridal party, speeches, and events as they occur throughout the night - and anything they ask you to say.