I will not create any new list of resources, but rather give links to existing lists of resources.
https://www.rstudio.com/ then select Resources from the menue bar.
The post Learning R: Index of Online R Courses, October 2015 by Joseph Rickert gives a comprehensive list. Based on the title, I assume that Joseph will update this list regularly, so do check for updates at the Revolution Analytics website.
I also link to a figure in Joseph’s post based on the rule of thumb that one needs about 10000 hours to master the use of a complex system, be it R or an advanced digital camera.