There is the SAS learning center to help learn SAS:
https://www.sas.com/en_us/learn.html
And videos at:
http://video.sas.com
To answer your question of whether it is worth learning it, we can't answer that as its really a personal situation, will you ever use SAS? Me I get interested in lots of things, however I don't have the time to put effort into all of it so have to be focused on what I actually need at that time.
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