How to fix my front screen myself and what parts to purchase?

Hi I’m not quite Sure if I need a glass replacement or need to replace the LCD + digitizer layer of my screen. Can someone help identify what type of damage this is?

The touch screen works fine and I’ve been having no issues with it for almost a year besides seeing the writing clearly in the colored spots. My textbook fell on it despite having tempered glass attached to the screen.

Can someone thoroughly recommend what I should do? I do have some PC experience but not sure if I should go about replacing a touch screen device on my own. Knowing what sort of damage will help me fix the issue