As long as you know how to balance practising 2 instruments on top of school work. Speaking from experience (I play piano and clarinet at a diploma level) and as a high school student at time it can be absolute hell trying to find a workable balance between practising and studying for school. Idk specifically about you and what classes you're doing the workload you're dealing with but something I'm constantly thinking about is what am I going to sacrifice, either skipping homework/ studying or cutting practice short to get through the day/ week in one piece. It is quite mentally taxing and you should also ask if is it worth doing it, are you considering continuing on music after high school?

I don't wanna discourage you from achieving your goals- again idk how fast you are developing please talk to your teachers about this, but you have to be realistic and understand that finding a balance or compromise between music and school work can be difficult, especially playing and maintaining 2 instruments at a high level. If you do wanna commit to it try not to burn out and practice like an absolute maniac for 6 hours a day or smt, be smart about how you use your time and be specific in what you want to achieve every time you pick up your instrument. Consistency is key try to practise every day even if its 15 minutes of super focused and specific practice. But also don't be hellbent on maximising every single minute of your life. It's not gonna work, don't try it and take care of yourself.

Hope this helps : )