Yes, i definitely agree with what isplicer mentioned above.
What is important is that you enjoy the subject and put in the effort. For me personally, I initially took biology as a subject to fill up my free periods at school. However, I started to feel that it was something I was really passionate about. This passion + perseverence allowed me to achieve a state rank for HSC Biology, which I never dreamt of doing at the end of year 11.
Therefore, PURSUE your dreams, be PASSIONATE about what you do, and PERSEVERE in it, this will only yield SUCCESS
Good luck!