Back yourself, or at least strive to put yourself in a position where you can back yourself. That way you can try new things with less risk.
Confidence in yourself is security. If you are confident that you can overcome any challenge, if you are confident that you can adapt to any situation, if you are confident that you can see things through, then you have security.
Confidence means security, which means you have space to try new things.
Confidence is key.