What happens next in this paragraph?

How to get your girl guides promise badge
If you haven't already, join a group.
Find a unit near you (you don't want to have to travel miles every week) and speak to their leader about you joining. If they have space, come along for a couple of trial sessions before you decide whether or not you really want to join properly.
Once you're sure you want to join, let your leader know. Then you can just continue coming as you have been already.