I have tried to go completely mouse/trackpad free with vimari/vimium, scoot, and rectangle. Worked relatively well, and helps me move things around as fast as I can think.
web moves: https://github.com/televator-apps/vimari mouse moves: https://github.com/mjrusso/scoot window moves: https://rectangleapp.com
Drag lock is a good setting, just test drove it and will be using it.
Ooh thanks for the hot tip on Scoot! I've been using Mouseless (https://mouseless.click/) for a while and it's been a game changer, allowing me to almost never touch the trackpad. That said, I like the fact that Scoot allows for selecting elements. Gonna give it a shot!