You have to believe in yourself. Math in the first grade is not difficult, but it is the key to make children interested in it. If you can do well in Chinese class, then math class is not difficult for you! One of my non-English majors, who passed Band 4 with a low score, also went to teach English to senior high school students. When I was in primary school, my Chinese teacher held several positions, teaching math and music. Now that I think about it, it is really not easy! Chinese teacher, come on!
If you are not sure, you can also consult the math teachers in our school and learn from them.