Sit down with girls and determine who will do each step of the project. Remember this is a girl-led project, so step back as much as possible and only help when they need it.
Take time to write down each step and who is in charge, keep the project plan close at hand so you can check back to it to see who needs to do what step. Look back to your list of community resources to see who may be able to help your group during the project.
Get stuck at a certain step? Take a break and come back to it another day to see the project in a new way.