Most possibly a pinched nerve in my neck is causing arm numbness, and not carpal tunnel. Which means there's no need to rest the wrist, so art activities shall resume immediately.
Arm itself is actually better the past two days, so holding off on further tests that will confirm or deny until it flares up again. It got bad enough to the point where I couldn't sit down and had set up a standing work station, but now I'm back to sitting again. Maybe it's a issue of adjusting my posture better or something (though honestly I think I'm fairly ergonomic). We'll see!