The recently released Baldur’s Gate 3 can be played with one hand perfectly fine. Your arm will likely heal before you finish it.
Edit: just noticed that you said you want keyboard only, in which case BG3 might not be ideal since it’s mostly mouse based. I think you can customize it to play with keyboard only since it has gamepad support, but don’t know what that’d be like.
There’s no fast paced clicking required though, so you could try to adapt to left handed mousery if you really want to play that one.