Hi Donald,
From what I am gathering, we might be wandering away from the real issue. It appears that you want to use the PayPal feature of Moodle, right? Have you read the documentation? If so, what is it that you don't understand? It seems more productive to me to take the discussion away from how programmers should flowchart and program to what you really want to do.
Moodle is a free LMS, and I think that you can see that there are many people trying to help you. If you don't like what you are finding, simply pick a different LMS.
MoodleCloud is your opportunity to run moodle without any need to set up your own server or buy anything. It uses the "real" moodle. However, since it is free, it has some limitations that you can get around by paying for more advanced features. Some would consider MoodleCloud as a place to experiment, however, it really could be used for people like you who might be wanting to try moodle for a course, just to get the hang of it.
I have used the other major LMS, and I personally find Moodle the product that does take into account student learning. But if it doesn't fit your own view, simply pick another LMS. By doing so, you don't negatively affect Moodle's "profitability."
It is not odd to not have access to flowcharts for many software-based products. For example, could one point me to the flowchart of how Microsoft Windows works? I just searched and came up empty. For Moodle's database, you can get to an ER diagram if you wish. But I wouldn't waste my time. I think that you want to explore using moodle, the first step is learning, and that's where I would focus my time. As another example, I sometimes sell books on Amazon, but Amazon does't provide a flowchart for this. I just read the documentation and do what it says. Also, I have never had any of my students as for a flowchart. (I think that in another comment to you I provided you a link to the videos that I do give to my students.)
I think that I have mentioned to you elsewhere that there is a Moodle Tracker system for feature requests. If you search it for my name, you will see that I actively use it. So with Moodle, the programmers are listening (you will see some of my feature requests being closed because they have been implemented.)
At this point, I would have to support Jon's comment to you that the Moodle documentation is very clear. I don't want to pretend that I am a mind reader or anything like that, but it appears that your desire to use PayPal might be more advanced than your general knowledge at this point. It appears that you are not understanding your own role in your own moodle since you cannot figure out how many accounts you have and how to change your name. But I also see that others have tried to help (and even do this for you.) Others will not run your Moodle for you for free. It is my belief that one can only run moodle by themselves if they are willing to learn how to do it themselves.
I have used the other major LMSs, and they all require learning. None provide any flowcharts. The other LMSs also do not document their products as well as moodle. But if you find a product that better suits your needs, go for it. If you want to try moodle, keep at it. Ask questions. And learn. If you have ideas to improve moodle, post them in Tracker.