When I started playing keyboards professionally (20 years ago), I faced a shocking reality...
There were other musicians who could play better than me.
I know, shocking! :)
I was so buried in my own creative world that I was unaware of the other creative people in my industry. When I become aware of them, it revealed the insecurities in my heart. I was
mortified to play in the presence of people who were more experienced. Then, I'd go home and beat up on myself for not being able to play better.
I'm so thankful for growth!
It's not that I never face fear now... sometimes the same feeling creeps up on me. But over the years, my faith - relationship with Jesus - has shaped how I look at myself and my gift. The purpose for using my gift became more about glorifying HIM and less about impressing those critical faces on the side of the stage ('cause you know all the musicians are always "on the side" looking). Recognizing that my gift is completely unique has settled me when I'm around more talented people. Also, appreciating other people's uniqueness has helped me to resist jealousy, envy or fear.
Nowadays, I really enjoy and look for opportunities to be around more developed musicians. I learn so much from them and it adds to my own gift development. I encourage you to do the same - get around people who are more talented than you!