Naming that you're still learning builds more trust than pretending you already have it figured out. Your team already knows you're new, pretending otherwise just costs you credibility.
Your team already knows you're new. Pretending otherwise doesn't hide that, it just adds a layer of performance on top of an already uncertain situation, and people notice.
Say "I don't know yet," not just "I don't know"
One has a plan attached. The other just leaves a gap. Pair the admission with what you're doing to close it.
Close the loop when you do learn something
Following up on a question you couldn't answer earlier is what makes the original admission credible instead of just an excuse.
Ask this in your 1:1s
"What questions do you have for me that I haven't answered yet?" · "Is there anything about how I'm approaching this that's landing wrong?"