📝 Update Advanced docs, add links to sponsor courses (#10113)

docs/en/docs/advanced/index.md

@@ -17,8 +17,17 @@ You could still use most of the features in **FastAPI** with the knowledge from
 
 And the next sections assume you already read it, and assume that you know those main ideas.
 
-## TestDriven.io course
+## External Courses
 
-If you would like to take an advanced-beginner course to complement this section of the docs, you might want to check: <a href="https://testdriven.io/courses/tdd-fastapi/" class="external-link" target="_blank">Test-Driven Development with FastAPI and Docker</a> by **TestDriven.io**.
+Although the [Tutorial - User Guide](../tutorial/){.internal-link target=_blank} and this **Advanced User Guide** are written as a guided tutorial (like a book) and should be enough for you to **learn FastAPI**, you might want to complement it with additional courses.
 
-They are currently donating 10% of all profits to the development of **FastAPI**. 🎉 😄
+Or it might be the case that you just prefer to take other courses because they adapt better to your learning style.
+
+Some course providers ✨ [**sponsor FastAPI**](../help-fastapi.md#sponsor-the-author){.internal-link target=_blank} ✨, this ensures the continued and healthy **development** of FastAPI and its **ecosystem**.
+
+And it shows their true commitment to FastAPI and its **community** (you), as they not only want to provide you a **good learning experience** but also want to make sure you have a **good and healthy framework**, FastAPI. 🙇
+
+You might want to try their courses:
+
+* <a href="https://training.talkpython.fm/fastapi-courses" class="external-link" target="_blank">Talk Python Training</a>
+* <a href="https://testdriven.io/courses/tdd-fastapi/" class="external-link" target="_blank">Test-Driven Development</a>