We have a saying: You can’t see the forest for the trees. It means you don’t understand something correctly. You are paying too much attention to the little details, the trees. You need to step back and look at the big picture, how all the parts fit together.
In English sometimes students stop themselves when they don’t know one word, and they get stuck on that one word and they stop.
Students say to themselves, “Because I don’t know this, I don’t know anything. I can’t speak English.” And they can lose sight of the most important thing, themselves. When we are talking together, you are what is important. You are what matters. English is just a tool that helps us reach out to each other. If one word doesn’t work, we’ll find another. One way or another we will understand each other. We’ll find a way, together.