Need to work with spatial data using R? rspatialdata is a collection of data sources and tutorials for doing just that. Check it out at https://rspatialdata.github.io/index.html.
Steve Haroz has just published (30 September 2021) A Succinct Guide to R available at http://r-guide.steveharoz.com/. It is a short introduction to the R language, pointing out some of R’s peculiarities often with humor. I recommend it to all who are just learning R.