R Basics - R Programming Language Introduction (#6089)

* R Basics - R Programming Language Introduction

* Update courses/free-courses-en.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

courses/free-courses-en.md

@@ -769,6 +769,7 @@
 
 ### R
 
+* [R Basics - R Programming Language Introduction](https://www.udemy.com/course/r-basics/) - R-Tutorials Training (Udemy)
 * [R Programming](https://www.coursera.org/course/rprog)
 * [R Programming Tutorial](https://www.youtube.com/watch?v=_V8eKsto3Ug) - (Barton Poulson) - (freeCodeCamp)
 * [R Tutorial For Beginners \| Edureka](https://www.youtube.com/watch?v=fDRa82lxzaU) - (Edureka)