What does a chorus conductor do?

I don't know the beat of the song you are conducting, but I will give you a general idea. Go back and practice by yourself!

2 beats: Draw inward first and then outward.

3 beats: Draw a triangle, starting from top-inside-outside-top.

4 beats: it's very complicated, starting from top to bottom-inside-outside-up.

I suggest you check the video online, there should be.