Courses for Sophmore

I'm currently a freshman in high school, and am planning my courses for Sophmore year. I am currently taking honors bio and am going to double up AP Bio and honors chem next year, and will be taking gifted English classes, honors precalc, and honors German. Additionally, I do have a passion project in development that involves a lot of online writing, play violin at the competitive level (5 years) and have been playing piano for double that (also does anyone know how I can do more with my piano skills), taking 1 hour of private lessons a week each. I also would like to study after school and am in school orchestra, health, gym, and normal minors like that. My history course recommendations are due and I'm wondering if I should take APUSH. My history teacher says for time I shouldn't but I'll be capable to, and upperclassmen I talk to say it's really easy and they did fine, but I'm scared. I don't want my GPA to tank or to fail the AP exam in May, but I really want to take APUSH to challenge myself, try a new learning environment, and it looks good to colleges.