As others have mentioned, SAS is enormous. How big (I made this awhile back and it is generalized)? :
~600 Functions
~300 FORMATs
~100 INFORMATS
~600 System options
~400 PROCs
I would use The Little SAS Book and learn from that. SAS is very, very approachable. Understand the data step and simple exercises and the rest can be had over time. SAS is way too big to create simple cheat sheets although someone may have. Data step and a handful of procs are very useful.
One other thing, some procs have an entire book written about them. Stay focused on a few simple ones and move into others if needed.
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