trying to design but struggling.

I seem to have hit a spot where I am really struggling to know how to start with these designs.

By just playing on illustrator I feel like I am doing work for nothing so really need to set up a strategy so I know what to do. I have a crit tomoro so hopefully this will be nice and inspiring.

I want to keep with the beautifully crafted side of invitations but add my own twist. Like they are collectable (even though they arn't) It gives the first impression to friends and family of one of the biggest days in your life so I feel it is important to get the feeling right.