I agree that is difficult to find good blog posts/tutorials on technical stuff. When I want to learn something for the first time, I usually go through the docs and if they aren't friendly enough (for me) to read them and learn, I go and google a nice book about the topic. That being said, there are a lot of nice blog posts about technical stuff, not tutorials/teaching but actual experiences/opinions, people sharing and documenting what they learnt. I appreciate those.