When we undertake something risky or unusual–a task for which we do not possess "traditional" qualifications–we often use the phrase "Fake it" (until you make it). But if a job calls for 5 years of X and I have only 1 year of X but 4 years of Y and Z, does that mean I'll need to fake it to make it? If I'm smart, adaptable, hard-working, and confident, does that make me a faker?
We should expect more from ourselves and each other. Give yourself credit. If you choose to take a risk, to go outside of your comfort zone, to ask someone to see the whole you instead of the resume version and let you learn along the way, you're not faking it. You're doing it.