Be creative. Dont put all the informations in the first email. Make the first one compelling and nurture the lead with more detailed infos about the process and details in the follow ups

@Ameen Ul Islam I do these kind of things as the last step of the sequence, since there is no additional value. Just trying to get attention

You can scrape leads yourself or buy leads

High quality leads means they might be interested in some services/ products based on some criteria you know. You convert them to engaged, by talking to them and asking if they have X problem and if they would be interested in your solution