I used Datacamp about a year ago with the student pricing. Now I am not sure if the prices are worth it. (Keep in mind USD prices to CAD conversion.) Their cheat sheets are really good. I use the dplyr data wrangling one very often.
I do prefer R as I am very comfortable with it compared to Python. As of late, I have been trying to improve in Python as there is more utility (I think) compared to R. I do cycle between the two as well.