Independent scrolling on both sides; split screen

Hi there, I am looking to build out a site that is similar to this one: which has independent scrolling on both sides. There isn’t a jerk when scrolling to the top or bottom, but I seem to be still having the issue of that jerk when scrolling. I currently have two divs with overflow on scroll and they both independently scroll, but again there is still no fluidity like the site above. Any help would be greatly appreciate as I am still a very new designer in Webflow and really want to learn :). thank you so much in advance!

Also, if there is an easier way to create the animation of clicking between about and contact other than a hide/show animation, that would be appreciated as well but just figured I’d ask!

Here is my site Read-Only: Webflow - AD90