Tutors help, even if you’re pulling an A, and often they help make the difference in keeping one. Everyone has gaps in what they know, and a few frustrations in learning from this teacher or that, or with a particular part of a subject.
Beware of over-committing. An enormous land-mine that can go off on your transcript if you dual enroll at a college and they you are highly engaged in a number of ensembles or performances at the performing arts high school if you are required to perform for your grade in a large enough number of different shows over the semester.