The Less Said the Better
When meeting someone new make the following assumptions.
Assume they are smarter than you.
Assume they have better experience than you.
Assume they are honest and are telling the truth.
Assume you will learn something from them.
Assume they are interesting,
Assume you like them and treat them as a friend.
You will be wiser even if you are wrong about any, or even all these assumptions.
They, on the other hand, will be impressed with you, even if they learned nothing at all about you. Because you were respectful and interested in them, they will assume good things about you. As soon as you open your mouth, their impression could change.