Here is the collection of the websites, which I can recommend for further education and inspiration
Blogs
Jeffrey Shaffer: https://www.dataplusscience.com/about.html
Jeffrey Shaffer: http://www.tableaureferenceguide.com/
Andy Kriebel: www.vizwiz.com
Nadieh Bremer: https://www.visualcinnamon.com/
Alberto Cairo: http://albertocairo.com/
Alberto Cairo/thefunctionalart: http://www.thefunctionalart.com/
Cole Nussbaumer Knaflic: http://www.storytellingwithdata.com/
Nathan Yau: https://flowingdata.com/
Shirley Wu: http://sxywu.com/
Data Visualization
Visualizing Google data: https://trends.google.com/trends/story/US_cu_6fXtAFIBAABWdM_en
Generating Datasets with Varied Appearance and Identical Statistics through Simulated Annealing: https://www.autodeskresearch.com/publications/samestats
Collaboration Nadieh Bremer & Shirley Wu: http://www.datasketch.es/
Visual Vocabulary: https://ft-interactive.github.io/visual-vocabulary/
The Great War: http://www.poppyfield.org/
Manoloide: http://manoloide.com/works/generative-ui/
Data Visualization with D3.js
The Facebook Offering: How It Compares: https://nyti.ms/2HtPYD7
Typefaces
Color
HTML Color Codes: https://htmlcolorcodes.com/
Pinterest: https://www.pinterest.de/pin/87609155230715320/
Colorhunt: https://colorhunt.co/
Adobe Color: https://color.adobe.com/de/explore/?filter=most-popular&time=month
Color Brewer: http://colorbrewer2.org/#type=qualitative&scheme=Accent&n=3
Lol Colors: https://www.webdesignrankings.com/resources/lolcolors/
Tableaumagic/color: https://color.tableaumagic.com/
100 brilliant color combinations and how to apply them to your designs: https://www.canva.com/learn/100-color-combinations/
Data Sources
Google Datasets: https://ai.google/tools/datasets/
Google News Initiatives: https://googletrends.github.io/year-in-language/
Others
Exercises: Data Visualisation by A. Kirk