Not much to add except that it's important that you keep your gear at least somewhat up to date. And make sure you're wearing specific tank gear, not just "Disciple of War" gear, as it'll help a lot with your survivability and make your job (as well as the healer's) a lot easier.

And both the mouse/keyboard combo and the controller are valid options. It really depends on what you prefer, I play with a controller and don't find it to be difficult. I think mouse/keyboard may give you a bit more flexibility and customization though if that's important to you.