It can be helpful to try to step away from the specifics of project delivery for a moment and ask yourself: what changes do I want this project to make? How will be the participants (or wider community) be changed by this project? Outcomes should relate to the original need your project is trying to satisfy.
There are lots of free useful resources online to help you identify outcomes. The Charities Evaluation Services has some great free downloadable resources.View their online guidance to outcomes