Nothing has been better for my mental health in 2023 than just making a habit of catching myself when I think I'm "faking it" or other imposter syndrome crap and just going "yeah but who's gonna call me on it"
My boss? No, because he doesn't want to do this himself, he thinks it's beneath him, so he won't object. My coworkers? As long as I don't take a dump on their daily routine they'll answer questions with a smile. My co-hosts on different shows? Again, as long as I keep hitting deadlines nobody is gonna give me hell because they'd have to do the work if I don't. Do I know how to do the thing all the time? No, but search engines and manuals exist and if none of those have an answer, well, congrats, the people who didn't do it already probably also don't know how to spot-check whatever godawful kludge I come up with for a fix.
I have completely done away with panicking about status meetings because it's just "show you did something, answer the request you got at the last one, don't call anyone 'daddy'" and I'm golden. The best lesson I can give anyone young is at some point you'll probably want to try leaping out of studenthood/retail work/whatever you feel "safe" in to a job with more responsibility and if you aren't setting fires visibly, you're fine. You're gonna do fine. I was a bigger fuckup at your age than you could possibly be and they keep paying me.