Computerworld's Sharon Machlis has done a great service for the R community — and R especially novices — by creating the on-line Beginner's Guide to R. You can read our overview of her guide from 2013 here, but it's been regularly updated since then.
As an added bonus, the guide is now available as a downloadable PDF for your offline-reading pleasure. You'll need to provide your email address to download it, but that's a tiny price to pay for this excellent hands-on guide. Put it on your e-reader (or print it out if you're going the old-school route), put it next to your laptop, and type in the R commands from its 45 pages of worked examples. (Yes, you could cut-and-paste them if you like, but I find actually typing commands is an effective way to learn a new language.) Download the PDF from the link below, and then check out some of the other beginner's tips for R from our archive.
Computerworld: Learn R for beginners with our PDF