Yeah Orchestration is the right way, its pretty easy when you start, just grasp basic concepts on how Biztalk works and then go straight into developing simple solutions into it. Biztalk provides different adapters out of the box, which includes, the File and SMTP adapters, so you can easily recieve messages using emails or Files of file system.
Here is a link to some useful Getting started material:
Regards,
Sajid.