All right, but I want a June wedding.
As for Avengers…you’ve got a few options, but I would recommend starting with The Ultimates, since that’s where the movies drew a lot of their inspiration for tone, character design, etc. Be warned though, they’re written by Mark Millar, who is sort of the Michael Bay of comics. He’s not for everyone, but the first two volumes of The Ultimates are fairly accessible.
After that, maybe move on to the mainstream continuity. I actually recommend reading The Young Avengers and Runaways first. Since the characters are all new, they’ll give you a look into the main Marvel universe without overwhelming you with old story arcs, and you get cameos from Captain America, Ms. Marvel, the X-Men, etc. From there, try picking a few characters and jumping in around the time of the Civil War story-line. By then, you should have a good idea of what characters and storylines interest you the most.
Basically, read anything that interests you, and anything you can get your hands on. It’ll be confusing at first, but after a while you’ll get a feel for which artists and writers you like, and which characters you love so much that you’ll put up with bad writing/art for.
Also, remember that your local comic book store is a great resource for asking questions about things you don’t understand. The staff there will have their own favorite comics to recommend for you, and will remember things that I’ve forgotten.