R Download and Installation: https://cran.r-project.org/
R-Studio Download and Installation: https://www.rstudio.com/products/rstudio/download/#download
To get started with R, I would suggest you to look at the below links:
This is a nice source to introduce yourself to R and basic statistics. Also, the datasets are available on this site that you can work on. For this workshop, I will suggest that you try out chapters 3, 4, 5, 6 and 15.
R in Personality Project: http://personality-project.org/r/r.short.html
Introduction to R: https://cran.r-project.org/doc/manuals/r-release/R-intro.pdf
Statistics in Research Methods: http://personality-project.org/r/r.205.tutorial.html