Congratulations on connecting your fan page to ManyChat!
When you start using ManyChat, there are initially no subscribers on the page, so you might be wondering, “How do I even get them?” - This article will guide you in the right direction!
First, keep in mind: users who have previously sent messages to the “fan page” on Facebook will not be automatically imported into ManyChat, butthere is a trick..
Now, everyone who sends messages on the page with the bot enabled will automatically become subscribers. As you can see, it's not difficult to let the numbers grow organically!
Here’s another simple way to invite subscribers to join your bot: you can share the Messenger link of the bot (the blue “m.me” link in the “Dashboard” tab of your ManyChat account) with all followers of that fan page on the page's timeline. Just click the link and then click the “Get Started” button to become a subscriber to your bot. It's that simple!
We also have a variety of growth tools that will definitely help you expand your audience. To learn how to set up growth tools on your website,please watch this video tutorial.Some of these tools includeMessenger Ref URL,Facebook Comments Growth Tool,Embeddable Widget,Overlay Widgetetc.
Additionally, here’s a brief overview of some useful tools provided by Eyal Toledano:
(Please visit: Using ManyChat Growth Tools to Get More Subscribers )

Note: The video may contain some outdated parts of the ManyChat interface - however, the strategies described in this video are still useful. We will ensure to provide an updated version of this tutorial as soon as possible.
Hope this helps you get your first subscriber!