You can't get it exactly the same, but I did see someone that was working on a keyboard only build. They seemed to have everything sorted except for the active help window, so just play around with your keybinds and learn all your shortcut keys and you'll get there. I've personally gone the opposite way, and assigned all the targeting buttons I'd normally use to my mouse so that I don't have to always rely on trying to click on moving enemies/players.