Cold messages to people in my field, do they work? - first time posting

A friend suggested informational chats and I do not know how to ask. I have read a lot of threads here and could not find my exact situation. Some people reply with short answers. Did any turn into leads?

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.

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