Update README

Author: weipin

README.md

@@ -2,6 +2,17 @@
 
 Unofficial async Rust tutorial. [>> Read online][1]
 
-Any PR is welcome and it will be merged immediately.
+## About
+It feels good to be able to finish the initial work in the first month of 2025.
+The process of the writing helped me to understand the overwhelming topic:
+"async Rust". Now it would feel even better if you happen to find the content
+useful.
+
+While oversimplified, and not the most accurate, the tutorial might be one of
+the easiest to follow. Consider it a tutorial written by a beginner for the
+beginners.
+
+Errors or suggestions, please create a PR and it will be merged immediately.
+
 
 [1]: https://weipin.github.io/hello-async-rust