RStudio Cloud was developed to be a quick and easy way to start using R. It comes with a guide on how to navigate RStudio Cloud and also provides tutorials on the basics of R.
Google recently open sourced Colaboratory, a complete setup of python that requires no setup and runs entirely in the cloud. Colaboratory integrates with Google Drive to store your project making it super easy to share your work. Colaboratory also has Googles collaboration features built in so you can write code with your friends in real time.
The R programming language is generally installed alongside RStudio IDE. R is just the language by itself where RStudio hosts the R language and provides a useful development environment (view plots, navigate file structures, etc.).
First install the latest version of R.
The Comprehensive R Archive Network
Next, install the latest version of RStudio.
How to Setup a Data Science Environment
Insert how to install Anaconda