A couple of questions

Hello I am creating a fan site for SeaWorld Adventure Parks and well, I would like the site to make you feel like you were at the park except in your home.

So first I would like the opening page to be like the welcoming gates, then once in the gates I would like there to be a guidemap (the entire page a interactive guidemap, and you could click on a ride and it would have pictures and the description, and a video etc etc.

What would be the best way to do all this?

(I can make simple animated movies in Flash, but very simple, dno if that would help me or not)

Any suggestions?

I would suggest flash for this.
You could always use image maps but that's way too much work considering
you have flash around.

You'll mostly it seems be using eaction script to execute commands on events.
Try a google search for action script tutorials. Or even try out the flash forum on devshed.