I would take the first class in algebra. Surprisingly group theory gets used in a lot of fields from statistics to physics. I would look into applied linear algebra, a class on matlab or r or python, a calculus based probability and statistics class, a class on linear regression, an optimization class, and if it is not too hard a class on causal inference (python seems to be the hot language these days)
Most likely it would be too much…If you don’t do well, your GPA suffers. If you don’t try to accelerate so much then your GPA will like you.
Read this and don’t be this student:
http://talk.collegeconfidential.com/college-admissions/2078509-would-this-be-stupid.html#latest
Those theoretical math classes aren’t like organic chemistry and physical chemistry, the next in the sequence. I would not recommend them for someone in high school who doesn’t want to major in math.