Don't wait for confidence to show up, you earn confidence by doing, taking (massive) action, moving outside of your comfort zone.
Julian and Bob not only guided me on what I needed to know but, as an unexpected bonus, taught me the skills and mindset I needed to be confident in myself and my coding ability. - Alex K
The confidence I gained by building actual web applications allowed me to reach out to other developers and start contributing to an important open source project. - Punit J