I don't want to sound grumpy or anything, but if I were you I'd actually just learn how to you the wasd keys instead of the arrow keys. Using the arrow keys gives no real benefit and it's all much easier to control the character and use rest of the commands in general if you use wasd, close to the spacebar for jumping, r/f = up and down in water, shift for walking, changing the cameras and emotes is closer.
Just forcing yourself into using them a couple of times and you will actually like it more, moving might not be easy for a start, but everything else will be instead of tumble around all over the keyboard, if you keep the wasd you will much easier locate keys without needing to lift or actually look.
Personal opinion.