I would try a few Plasma based tiling scripts before switching to anything like Sway or i3. You’ll get a good idea of whether it’s for you. Later on if you find you need more control over the tiling you could switch to a dedicated tiling window manager.

I’m using Karousel in Plasma which is scrollable tiling. You can install and enable it like so:

Go to System Settings > Apps & Windows > Window Management > KWin Scripts > select Get New… > In search enter Karousel and wait for it to show up > select Install > select the latest version (as of now karousel-0-9-4.tar.gz).

There is a companion desktop effect that also needs to be installed like so:

Go to System Settings > Apps & Windows > Window Management > Desktop Effects > select Get New… > enter Geometry Change in search > select Install > select the latest version (as of now kwin4-effect-geometry-change-1.3.tar.gz).

Karousel and Geometry Change have configuration options and Karousel also has keyboard shortcuts (view here) which you may need to update to your liking. I don’t have a need to configure anything in Geometry Change as the default animation settings are fine. For Karousel I tend to adjust the various spacing and gaps options along with making sure the shortcuts I want are configured. That link above has a short video of what Karousel looks like in action.