Hi Anthony, It sounds as though you're attending a strong high school which is great. It's true that Graphic Design is used all over the world, however, it is also true that with the advent of lots of visual software developed over the past 20 years, many people have learned Photoshop, and other programs, and then marketed themselves as Visual Designers. Learning the software does NOT an artist make. So, you need a college degree, GOOD design/art classes, and some hands on experience - not just using computer program. The specific college course offerings and type of design major matters. So, for example, learning how to design for websites, knowing HTML, Wordpress, etc. is important. Your college program needs to be up on the LATEST trends too. Interactive Media, video production, audio production as well if you can get it. Companies are much more aware of good design + art skills now. So you will need to graduate with a strong portfolio AND you need to gain some work experience through summer internships BEFORE you graduate.
I hope all this helps you!