It seems to me that if your teacher recommended it, you must be ready or close to it. Every good musician runs into a situation where he/she comes to a place that feels way over their head. But it might not be!
There are times when you must take the next step. This might be it.
I remember when a Christian recording touring group in the 70s (at the height of my playing career) offered me a position with them. I was supposed to go to the East Coast for 3 weeks of rehearsal and to memorize the music. Then start a tour in Japan. I had to make a two year commitment. It was a lifetime opportunity lost on a poor confused college kid who thought 2 years was too long -- I was in love you know. She dumped me 2 months later for a guy on drugs. But still, it was an honor to have been offered the position -- one I thought I could never "win."
Do it. As my sad
story would suggest, make the most of the opportunities before you.
Jim