Animate Background Image and text on Scroll

Hey everyone,

I want to create an animation on scroll like on this website:

So basically, the background image switches, and the text on the side cycles through. Maybe also a text block that changes to update with more info on the project. I have no idea how to start. Can you give me some pointers? I would very much appreciate it.


Here is my public share link: [LINK]1
(how to access public share link)