That looks brilliant!
I can read Spanish (but don't ask me to write it, please :-). What you already written is great!
What I like about it is how it uses, very well, VISUAL CHARTS to depict fundamental things.
IMO that is exactly right for TiddlyWiki which is simultaneously dynamic in many directions. Simple procedural explanation does not really capture what it can do in the way those diagrams can.
I have two comments on what might be interesting for you ...
1 - Explanation that its possible in ONE Tiddler in TW to combine macro code, HTML markup and WikiText. That is very unusual. So unusual it took me months to realise that. Odd as it may sound most documentation elides this simple point.
2 - Central to TW are LISTS & FILTERS. Understanding these two aspects of TW I think gives a fundamental foundation in what it can do. Tobias Beer's work on this is superb because he helps you get an overview. For example:
http://tobibeer.github.io/tw/filters/#Filter%20Examples. Even so its still too linear IMO to fully put it in context. I'm interested to see how you might present that.
Very best wishes & thankyou!
Josiah