Most product vendors offer instructional content. Narrative and video tutorials (of varying quality) can be found online. The following are a few suggestions.
These blogs are galleries may be useful for sharing knowledge and sharing inspiring data visualization examples.
These sites describe and display mistakes and failed data visualizations.
A special thanks to Patrick Wolfe who provided much of this content as well as the page design. Patrick is currently an MLIS student at the University of South Carolina, completing his degree this summer (2023). His interests include research data management, data visualization, and geographic information systems, particularly working with STEM fields and open science initiatives.
During his internship working with the Digital Research Services unit of the University of South Carolina Libraries, Patrick developed and created the following guide to data visualization.