First, get R from cran.r-project.org or one of the many mirrors.
Second - Get help learning R. Below are some resources.
Statistics Globe on YouTube by Joachim Schork who also post often on Facebook.
yuzaR Data Science on YouTube by Yury Zablotski who post often on Facebook.
Cheat Sheets - A collection of various cheat sheet by RStudio.
Quick R - GREAT page.
Cookbook for R - GREAT page.
Gardeners Own - Using R for statistical analyses - A good web page based on a book looking at different statistical methods.
The R Project for Statistical Computing - Home page for R
Graphic
GGplot2 by Hadley Wickham - Excelent information by the man that wrote the book on GGplot
Quick R - GREAT introduction page.
Installing R on Linux