Cold messages to people in my field, do they work?, electrician's helper here

A friend suggested informational chats and I do not know how to ask. This is my first time dealing with any of this. I want advice, not a job directly. What did you ask?

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.