All registered CALI users should have access to the "Demo Server Users" Forum.
If you can't see/access this, just post a reply here and I'll sort it out for you.
The Demo Server has a number of simulation scenarios already set up, which you can investigate, or you can create new instances of a scenario and have a play through the simulation. Hopefully having a look at the server will be able to give you a basic idea of the SIMPLE platform, and some of the types of scenario that have been played out already!