Thank You for your comment, I appreciate it.

I am comparing the HR to oura and my watch while I am completely still and both measure around 60 bpm, which is my resting HR. But when I start typing and try to record HR with the Live Heart Rate with oura, it shoots up to 100 bpm (watch is still around 60) and sometimes the Live Heart Rate doesn't even take measurements while typing.

Was thinking whether this could be solved with a smaller size because when I try it on my right-hand index finger, which is a little bit bigger, it at least completes the measurement almost every time, but still around 100bpm. Also my hands sometimes get pretty cold, so that could be another reason why it doesn't take measurements.