Hello there!
There are a lot of education guides how to model eEPC. But there is no a complete model with particular steps how to create a business process. In my view it will be useful to have a complete guide at one's fingertips how to model a business process using EPC and ARIS Express. Just try my model to create a business process and you will see that you will do it very fast and won't miss any complex rules of eEPC notation!
Download it and begin to model! :)
Cheers,
Ilya