Background: This question is aimed primarily at those of us who have been using LaTeX for quite some time but feel like they do not have a very "principled understanding" of it even though they would like to (i.e. those of us who want to go from intermediate to advanced but feel lost at sea).

TL;DR: Does anyone know of a course like structure (MOOC or otherwise...Udemy and Coursera have nothing of value) for intermediate LaTeX users to learn LaTeX in a "principled fashion"? Those of you who teach LaTeX at your universities, how are your courses structured (if you don't mind sharing)?

To keep this question relatively short, I'd simply like to say I've been using LaTeX now for a number of years and have never ceased to be amazed by its capabilities and even more so by the incredible support group here on TeX.SE. I've read several of the other questions somewhat related to this:

• Resources and advice for teaching LaTeX
• Using LaTeX to write a thesis mini course
• Introducing LaTeX in a course format
• How LaTeX should be taught to university students
• Udemy: LaTeX A-Z: from beginner to advance in less than 3 hour [sic]
• Computer science of TeX and LaTeX by Victor Eijkhout

The frustrating thing is that most educational LaTeX material seems to be geared towards either those who are just starting out or those who are much more advanced. For example, I look at the content of that Udemy course (and this is not meant to be a knock against it) and am rather surprised by the "advanced content" (all things I am fully comfortable with doing and have done before). But I look at something like the computer science behind TeX/LaTeX by Eijkhout and immediately feel a bit out of my depth.

So far my approach to learning has been to simply learn what's necessary as I encounter different problems (and post here on TeX.SE when I can't progress). Even when I have seen questions on here that I feel like I may know how to answer, I never do because I know several of the gurus here have a "proper" way of going about it all. I also know some members teach LaTeX at their universities (egreg and gonzalo come to mind).

In sum, I am eager to learn LaTeX in a "principled way" (understand the code for packages, be able to write my own, etc etc) but am lost as to how to do it effectively without a course like structure. Simply reading through the TeXbook, LaTeX and Friends, The LaTeX Companion, etc. etc. is not really cutting it anymore (it's so easy to get overwhelmed by the sheer volume of different books that one has great difficulty proceeding in a linear fashion). A well-defined structure would help a great deal.

Background: This question is aimed primarily at those of us who have been using LaTeX for quite some time but feel like they do not have a very "principled understanding" of it even though they would like to (i.e. those of us who want to go from intermediate to advanced but feel lost at sea).

TL;DR: Does anyone know of a course like structure (MOOC or otherwise...Udemy and Coursera have nothing of value) for intermediate LaTeX users to learn LaTeX in a "principled fashion"? Those of you who teach LaTeX at your universities, how are your courses structured (if you don't mind sharing)?

To keep this question relatively short, I'd simply like to say I've been using LaTeX now for a number of years and have never ceased to be amazed by its capabilities and even more so by the incredible support group here on TeX.SE. I've read several of the other questions somewhat related to this:

• Resources and advice for teaching LaTeX
• Using LaTeX to write a thesis mini course
• Introducing LaTeX in a course format
• How LaTeX should be taught to university students
• Udemy: LaTeX A-Z: from beginner to advance in less than 3 hour [sic]
• Computer science of TeX and LaTeX by Victor Eijkhout

The frustrating thing is that most educational LaTeX material seems to be geared towards either those who are just starting out or those who are much more advanced. For example, I look at the content of that Udemy course (and this is not meant to be a knock against it) and am rather surprised by the "advanced content" (all things I am fully comfortable with doing and have done before). But I look at something like the computer science behind TeX/LaTeX by Eijkhout and immediately feel a bit out of my depth.

So far my approach to learning has been to simply learn what's necessary as I encounter different problems (and post here on TeX.SE when I can't progress). Even when I have seen questions on here that I feel like I may know how to answer, I never do because I know several of the gurus here have a "proper" way of going about it all. I also know some members teach LaTeX at their universities (egreg and gonzalo come to mind).

In sum, I am eager to learn LaTeX in a "principled way" (understand the code for packages, be able to write my own, etc etc) but am lost as to how to do it effectively without a course like structure. Simply reading through the TeXbook, LaTeX and Friends, The LaTeX Companion, etc. etc. is not really cutting it anymore (it's so easy to get overwhelmed by the sheer volume of different books that one has great difficulty proceeding in a linear fashion). A well-defined structure would help a great deal.