Take all the science and math classes available, especially chemistry. The way pharmacy school classes are structured you are using science, math and chemistry combined for a lot of classes.
The associates degree option is great! It gets you 1/2 thru undergrad before you get to college. Once in college, check entrance requirments for pharmacy school and take those . Usually college calculus and physics will be required.
Remember to get out into the community. Pharmacy is a very people oriented field. Get out and meet the people. Chain pharmacies and hospitals will usually not let you "shadow" without backround check and drug screen. Try an independent pharmacy, locally owned corner store kind of place. You can get a feel for what pharmacist do. Ask at your place of worship, your parents job, or the neighbors. Somebody knows a pharmacist. If people love what they do, they will want to share it with you.