Freelancer,
This is not intended to be a hurtful or offensive response, but I’m afraid that MODx is probably not a good solution for you. It is not a good fit for web novices (see my signature for an accurate description for whom it’s intended). Teaching the basics of web technology like FTP, or how to Google for "Cute FTP" is not something that is topical to MODx. I unfortunately don’t know where to tell you to go to learn the basics, but I’d start by visiting
http://google.com/
The essential knowledge you can gain via searching to learn about fundamental basics apply not only to MODx, but also to pretty much any other open source software available. From your responses, you need to learn some very important skills before you jump into a comprehensive application like MODx. Medical students don’t start out doing open heart surgery on their first day of class, they have to master a lot of essential skills and learn a ton critical of critical information before they even begin to work on cadavers, much less a live human.
In the end, I have a feeling that you’re enthusiastically getting a bit ahead of yourself, and a solution like Dreamweaver that has lots of add-on documentation and books available might be a better starting point. Best of luck, and best regards!