Where do i learn the skills to create this

So I’ve got a client that wants to build a site like this:

Specifically 3 things from the website:

1. The fullscreen sections that change as you scroll (meaning it does a full section on 1 scroll rather than moving the screen down slightly)
2. The animations when a new section is scrolled to (Meaning it doesn’t look like it scrolls down)
3. The horizontal scrolling when it reach’s the work section (he wants 1 section to switch to horizontal scrolling as you reach it then switch back from it)

Any articles or tutorials that could teach me this?