How do I ask for an informational chat? - what worked for you?

I want to talk to people in a new field but I hate cold messages. This is my first time dealing with any of this. I worry about bothering people. How do you phrase the request?

Do not apologise for asking. Most people remember someone who helped them.

I wrote three short lines: who I am, why them and a small ask for fifteen minutes. About one in four said yes.