How do you find a mentor who isn't your manager? Cold DM, or does it need a warm intro first?

Ask for one 20-minute call, not a mentorship. 'Mentor' sounds like a big commitment, and people say no to that word more often than to a coffee chat.

A warm intro helps, but a short DM works too. Name one specific thing you read of theirs and ask one concrete question. Most people answer that.