A Setting up R
R is a programming language and free software environment. The R language is widely used among statisticians and data miners for developing statistical software and data analysis. For a further overview and description of the history of R see Chapter 2 in Peng (2018). R can be run from a terminal but in general you use an IDE (integrated development environment) RStudio for running R and to saving your work.
R and RStudio can either be run from your laptop or using RStudio Cloud which run R in the cloud using your browser. During this course it is recommend to use RStudio on your laptop since there is no limit on CPU usage. If you need to install R and RStudio on your laptop check this out.
If you need a brushup on R have a look at DataCamp. First, signup for a course group. Next, have a look at the free courses such as Introduction to R. DataCamp runs all the courses in your browser. That is, R is run on a server and you do not use RStudio here.