Ahoy, there are a number of options to create bar plots. My go to is ggplot2's geom_bar, https://ggplot2.tidyverse.org/reference/geom_bar.html (note all the examples below the documentation).
Base R also offers the ability with the appropriately named barplot function. A quick intro here,
https://www.statmethods.net/graphs/bar.html
If you have trouble with any of this, it's helpful to walk us through an example of what you're trying to do (ideally with a reprex, FAQ: What's a reproducible example (`reprex`) and how do I do one?), and giving a clear sense of where you're having trouble creating what you'd like to see.