First of all, there is an excellent user manual for Vortex located here: https://scti.tools/manuals/Vortex10Manual.pdf
A good place to start is reading the Simulation Input section of the manual (starting page 19), which will help you to think about the information you will need to build a model in Vortex for your species.
To help you to think about the kinds of questions that the models can help answer, and the potential outputs that you will be able to produce, you can find reports from previous modeling projects on the IUCN Conservation Planning Specialist Group’s website: http://cpsg.org/document-repository. You can filter your search by region or taxonomic group to help you find models that are relevant to your project.
We also have a list of scientific publications using Vortex available on this website: https://scti.tools/downloads/#Publications