I love how excited you are for your trip!
If you click
HERE on the WDW website, you can find out everything there is to know about Extra Magic Hours in the parks. Scroll about half way down the page and you'll see that following attractions are open at Epcot during MORNING EMH:
Living with the Land
Mission: SPACE
Soarin'
Spaceship Earth
Test Track
And the following attractions are open at Epcot during EVENING EMH:
Living with the Land
Mission: SPACE
Soarin'
Spaceship Earth
Test Track
Honey, I Shrunk the Audience
Journey Into Imagination With Figment
Gran Fiesta Tour Starring The Three Caballeros in the Mexico Pavilion
Maelstrom in the Norway Pavilion
O' Canada! in the Canada Pavilion
The American Adventure in the American Pavilion
The Seas with Nemo & Friends
Have a magical vacation at Walt Disney World!