Hey SousaLord, i’m actually on a very similar path to the one that you are trying to pursue. For starters, keep participating in your orchestra as you’ll gain helpful experience and learn more about how to fit into an orchestra. As a sophomore, your main focus should be improving your fundamentals throughout the year. Long tones, technique, whatever just as long as you’re expanding your knowledge and skills. Something you’ll want to start thinking about is which music school/university you plan to attend to further your music education. As a junior, you’ll probably want to get in touch with the faculty at these schools and establish a basis for their perception of you. This relationship can set you apart from other applicants when you go through the audition process. Finally, don’t stress too much about it. You’re still young and it seems like you have a good future ahead of you. Learn to enjoy the clarinet and fall in love with it; don’t turn your life into “how much can i practice each day” as you will burnout and lose your passion. Good luck on all your future endeavors and I hope this helps!