How to approach the exercises of this book?

Hello! I started working my way through this book recently and while I think most stuff is comprehendible for my level (first year data science student), I feel that many of the exercises are kinda tricky and I feel I really miss prerequisites in order to solve most of them, especially the ones relating statistics. Most of the math exercises up to statistics were pretty fine but after that I’m a bit stuck.

Any tips regarding how I should approach this?