The Academy at UW is really a fantastic program where you will be well cared for, as a high school student and
eased in gradually. Also, the other high school kids in your program are likely to be good social friends. It does
get you graduated from college at a very young age, so you will have a slight disadvantage at age 19 if you try to apply for permanent jobs. But since you want to go to graduate school, probably a plus for you! Good luck.
I wish colleges in Colorado would consider such a fine academy program, but UW Seattle is one of the few early entry college programs in the nation. In most states, you could dual enroll, but its not as well organized as the Academy at UW.
You will miss high school Prom, and some high school activities, but it seems you have made up your mind! Congratulations!