If you got invited into the room, stop acting like you snuck in.

Someone looked at what you can do and decided you belonged there. Acting like a mistake was made does not make you humble, it just makes you quieter than you need to be, and the room loses whatever you came with. Belonging is usually settled before you walk in, not during.

In the next practice, class or meeting where you feel like the least qualified person, say one thing out loud in the first ten minutes. Not a big thing. A question counts.