You can’t start conversations with new followers automatically.

You can do it manually though, and once they reply your automations can kick in.

I don't what way I  promote keywords 

Hi, does anyone know ho to stop the automatic messages that my private messages writer receive?

They get:
Great, you're all set. Here's a link to join at [date/time]!

and

Psst... As a thank you for registering for my masterclass, here's a special limited-edition freebie just for you!

And I cannot find them!