Confidence comes from within and as long as you are putting forth a respectable effort to take good care of yourself, you should feel confident about that path.
Faith is the virtue by which, clinging-to the faithfulness of God, we lean upon him, so that we may obtain what he gives to us.
I came to the industry with wide eyes and an open heart thinking I was going to make a few films that really meant something that I could pour myself into.