I think you misunderstand how the process works, that is where the confusion is coming. May I invite you to read the whitepaper at curiesteem.com which explains how everything works in details. Also, as others mentioned feel free to drop by on discord and ask anything. I will be happy to help.

Only curators can propose posts, and posts are not proposed in chat. They are proposed on streemian.com/guild/curie. Anybody can become a curator, just need to be recommended by one of the top curators. I hope this helps.