I first tried KDE Plasma 5 but tbh I thought it was just a worse experience than Win7, it was really close but all the tiny little annoyances got in the way and it felt like I couldn't do everything I needed through GUI so I still had to use terminal but it was awkward having to switch between using the keyboard and mouse and I would navigate through the GUI to get to directories then open terminal...
After a month or two of that I finally tried a tiling WM (i3wm) and it's just a way way better user experience than any DE.
I will note though that I'm using Fish for my interactive shell and seeing anything in the tiny dmenu was just way too hard until I used Rofi for drun.
Without Fish and Rofi I might've tried more DEs or even gone back to Win7.
I recently used Linux Mint with Cinnamon on a relative's PC and using Bash and the apt package manager sucks so bad. I even prefer Arch KDE, although I think Nemo is a bit better than Dolphin.
Anyway it's been about 2 years of daily driving Arch with i3wm for me and I haven't really gone out of my way to learn things but you naturally pick stuff up along the way just by using it.
Just make sure you've got another device with an internet connection in case something happens. I basically haven't had any issues after I got better but I made a lot of user errors at the start. Nothing that can't be fixed but finding out how to do the fixing without internet is a million times harder.