Hey. So you just click reply at the bottom of the message. No worries, it's up to you. Just for future reference, it will help your articles be found easier as the words used in your sub title also affect your SEO. Best of luck to you:)

Here is a link to an article I wrote about private messaging that may help you in the future: https://artisticvoyages.medium.com/is-it-possible-to-private-message-other-medium-members-7b20a108027a