I can only recommend you to try out i3 on a dual screen if possible. It opens up a different world.
You can assign workspace 1-5 to monitor 1 and 6-10 to monitor 2. That creates a great workflow.
We figure out the name and resolution with xrandr. We can use this name in the ~/.config/i3/config.
There is more info on the i3wm.org website. Learn all about it there.
There is also arandr which is then graphical.
Then we set our variables and organize the workspaces.