Biochem vs Math majors

Hi guys,

I'm starting at UTSC this September. I was admitted into the Computer Science category but I definitely want to double major. I'm still unsure on what my second major should be. I've been good at maths my whole life and I've taken a linear algebra and real analysis course, both of which I really enjoyed (and preferred to high school style maths). I quite enjoy how logical uni maths is, while still requiring a lot of creativity and problem-solving. I enjoyed competition maths over high school maths for this reason as well.

However, my absolute favourite subject in my high school was Chemistry. My favourite unit in Chemistry was the biochemistry units, on medicinal chemistry or structured and reactions of key biomolecules. I've only taken one pure biology course which was in Grade 10, which I enjoyed much less because it felt like I was only memorising anatomy and nothing else. My dad says university biology will be mindless memorisation but I am hoping it's more creative and problem-solving-like than that (which I enjoy about maths).

I know some people will recommend me to take a biology course in first year to see how I find it (which I will!), but I guess the problem is I don't have space in first year to take prerequisite courses for all 3 majors: cs, maths, and biochem. That's why I'd like to be a bit more confident in my decision more before I confirm my fall semester courses.

Could people who've done math or biochem majors tell me about their experiences (and maybe how it compares to their high school counterparts, so that I can understand more)? I'd appreciate any advice for me.

Thank you so much!!!