Math-Heavy Deep Learning Paper Assistance

I'm seeking a tutor who can help me understand the math equations in a deep learning paper. The math is quite heavy and I would like to walk through it step by step, preferably in a call. I would also like to know which courses I should take to understand these kinds of papers faster.

The paper: https://proceedings.neurips.cc/paper_files/paper/2022/file/6fca3ed3c54ffeae947ae668a0841ab2-Paper-Conference.pdf

Thank you!