As someone who already knows how to program, I've really liked https://r4ds.had.co.nz/index.html.
It jumps right into visualization from the very beginning, which is great as a feedback mechanism, and also highlights R's strengths (ggplot2).
It jumps right into visualization from the very beginning, which is great as a feedback mechanism, and also highlights R's strengths (ggplot2).
To see more of what a package does and how to use it, look for vignettes on the package description page. For example, the `forecast` package[1] includes a journal article.
You could also look on bookdown.org, which showcases some online books made using the titular package. The are a lot of "Doing X with R" guides among them.