Thanks @Shjim for the encouragement. I have finally decided to simplify matters for myself. Instead of having to learn another set of keybindings for Plasma, since I already use i3 on my Thinkpad, I took the plunge and followed the Arch wiki page on replacing Kwin and as @frizzfrizzlol did to install the Awesome WM I repeated the same steps following the installation of i3. The only extra step I needed was to switch to LightDM as it gave the cog icon to select i3 as my new window manager.
Now everything seems to be working well thanks to @joekamprad 's hard work on adapting i3 to EndeavourOS. All I need to do now is to bury myself in the i3 User’s Guide for a few days to set up the i3bar and the workspaces as I want. It will be interesting to see if I can get some of the KDE tools to work in i3.