Wolfram Research has prepared a 3 part video tutorial (starring me LOL as lecturer) on the Fundamentals of the Wolfram Language.
it can be viewed at
there are both a notebook and a pdf (42 pages long) containing the material presented in the video and it is a good idea to download it (links are provided to it at the sites), print it our and use it to follow along with the lecture. it also is a a good reference source to have around, and it's free.
i hope this is useful to the community. it sure was fun for me to learn the Wolfram Language (WL), to use it to write code in 4 books and to teach it for many years.