you and your OH need to talk about what you both want.
That's the very first thing hun.
Then you need to talk about who you want there and their roles.
Then you need to decide when and where and what you're going to wear. (Just decide what kind of style you want first before you get bogged down, like do yuou want a great big fancy thing or something more casual?)
Then talk about things like photographers, invitations, flowers etc etc etc.