If you have not yet logged into RStudio which is actually officially called Posit Workbench, you need to login to Lehman 360.  On the left, open Lehman One Access.

Click My Apps.  Then look under Lehman Apps for the RStudio Icon, a blue circle with an R in it.

When you click this automatically creates an account. It takes a few minutes so be patient.   Once that is done it will log you in automatically.

You can always go in via Lehman 360, but once you have logged in once you can login directly at https://rstudiow.lehman.edu .

Using Swirl

Tour of RStudio

Little R Book

The Little R Book  is a reference book with details about various definitions and short explanations of things R-related.