First off check Coursera and Lynda (free for QUT Students/Staff) for upcoming courses.
There is also the official documentation, the contributed documentation and my freely available Introduction to R Short Course.
A nice bit of software for writing and running R code is the RStudio IDE. RStudio does useful things like colour coding different elements of the code for readability and autocompleting brackets.
If there is a particular analysis you would like to attempt in R the Task Views summarise R packages available for completing various analyses.
Bayesian Research & Applications Group 