Thanks Dirk for your suggestions! I did not know that presentation of Grassman algebra.
In my blog, I write mainly about 2 things: improvements in a little DirectX12 engine I am developing + new things I learn (like this article about normal vector transformation)
I try to show the things I learn, how I learned, how I implemented what I learned and what resources I used to learn them. Some topics are very well covered but in different papers, books, articles, etc. I try to make questions and answer them in a blog post. I do not know if that contributes or not to the community, but sharing knowledge + source code can help. When I share these posts, I get invaluable feedback from people with more experience than me.
And yes, I agree that these posts are also useful for me too because if for example, I forgot something about the geometry space transformations, I have a post about that that will help me to refresh the topic.