win rate or risk to reward; which is more important?

For me I would prefer improving my risk to reward by knowing how to select the best trades with lowest risk. In the end, a good RR will translate to a higher win rate

You can have a high win rate but still be unprofitable if the amount you win is peanuts and the amount you lose is sizeable. The RR is more important because it keeps your losses small and your winners bigger.