Might be a little biased, but I did find this two-part series helpful. https://www.dataquest.io/course/exploratory-data-visualizati...

You work at DataQuest? Thanks for sharing this!

yup! happy to.

DataCamp has many useful courses, including an Introduction to Data Visualization with Python:

https://www.datacamp.com/courses/introduction-to-data-visual...

Have you tried it? I am trying to go beyond an introductory course.

Yes, I have completed around ten DataCamp courses. They do go beyond the basics, as can be seen in their skills tracks:

https://www.datacamp.com/tracks/data-scientist-with-python