JAVA based application I need to understand

I have a lot of experience with development in various languages, but JAVA is not one of them. I have a product that is working (not my own), that I'm taking over. It is a JAVA application written and supported using Eclipse. It does a variety of things, including listening for changes in a folder, processing files, etc. I have been taking JAVA education through Pluralsight, but I need to understand this product, how it functions, etc. I need someone to help guide me as I have questions, and there will be many. I want to send you the source, and then have 2 hours of your time to talk through the application. After that I will send you either e-mails or other communications via freelancer with questions I have in the code. Each response will be an agreed upon amount. I'm going to need this type of support for months as I get up-to-speed on JAVA, both this application and understanding the language as well.