Confidence should make you more teachable, not less.

Real confidence lowers the cost of learning. If you are secure, being shown a better way is interesting rather than humiliating, and you can absorb correction without spending anything to protect yourself. When confidence makes someone unteachable, what is actually being protected is a fragile self-image.

Notice how you receive instruction from someone more skilled. If it stings, that is worth examining. The people who improve fastest are usually the ones for whom being corrected costs almost nothing.