Hey, don’t feel stupid. I’ve missed plenty of obvious things before, and half the time when I’m lucid it’s not because I’m concentrating but because it’s a random realization. But since you say you’re new to it, you sound like you’re doing pretty well so far. There’s not much I can say except to practice and try different techniques. Have you read about the different techniques listed here? Here’s some different techniques that might help you: https://community.ld4all.com/t/all-ld-techniques/24932 I hope that helps.
There’s not much else I can do, so I hope this helps you. So, good luck with the lucid dreaming!