I encountered imposter syndrome a lot. Literally at every step from learning to the first job. At each tech meetup, my first tech conference, working as a teacher assistant at a tech bootcamp, several hackathons, volunteering, and so on and so on. My point is that I think it's natural no matter the situation. You meet people you are impressed with and in a space you are barely knowledgeable of and the air is sucked out of your lungs. My only advice is to endure and ride it out.
At each step of my journey I’ve set up plans to face imposter syndrome head on. Going to an event, bring a buddy. Have an interview, do tons of mock interviews to build confidence and do your homework on the company. Entering a hackathon, prior to the event build 3 projects in shorter and shorter time periods. AKA, tackle imposter syndrome like it's a coding problem and build confidence through experience.
I used to be so nervous about building things in front of others. So I set out on Jan st to build 20 side projects starting from Hello World to several apps that can be used by others. This prepared me for hackathons, it prepared me for take home assignments, and I was gung ho for any practical technical interview question. Case in point, my first tech job my technical interview question was a CSS question that I nailed because I’ve done it dozens of times at home.
Practice makes perfect, and repeat success builds confidence. If someone else can do it, so can you with intentional effort.