Please confirm that I've understood correctly what your issues are:
- You need to have access to your MoodleBox remotely, from the Internet
- You need to update content (courses, resources, activities) on your remote MoodleBox
- You need to have a look at the progress of students from your remote MoodleBox (if this is what you mean by "retrieve" it)
When we know precisely what help you need, we can give you a hand, so TIA for your feedback.