Speaking of maps, Finnish geographer Topi Tjukanov is behind this dead simple but very effective demographic coropleth map, that you could probably recreate with available data for your nation already this afternoon:
Finding it hard to come up with new ways to visualize the Covid-19 spread? Here's a novel approach from Our World in Data and the Dutch interactive agency Tulpin. Some of the data is a bit dubious (like territories missing data marked as infection free), but the approach is brilliant.
Here's a project for your next data journalism hackathon: Recreating Jacques Bertin’s reorderable physical table. Jacques Bertin was a cartographer and data analyst who did groundbreaking work on visualisation as a tool for understanding your data. Among other things, he created a physical, reordable table for grouping data. Like Excel, but made out of wood. The project is a couple of years old, but we discovered it just now, made us start thinking about different ways to explore data physically:
Related: A list of physical visualisations, starting in Mesopotamia