Thank you for the suggestion, I will be making more and more material available in the form of videos, documentation, and research papers (this takes some time and effort).
As with you, I am still in the process of learning geometric algebra myself also, and I would be happy to receive comments and feedback on what
Grassmann could improve on (in issues or on gitter), although I can’t guarantee that I will be able to address all concerns immediately.
Unfortunately, there isn’t any place in the world that truly teaches geometric algebra, historically it has only been explored by those who are willing to research it and adopt it as a system. There are plenty of great resources in the form of research papers and books available.