You don't need the software in order to read the documentation. Here are some topics to explore.
In PROC MEANS, what does the NOPRINT option do?
In PROC MEANS, what does the OUTPUT statement do?
In the OUTPUT statement, what does MEAN= do?
What does a DATA statement do?
What does a SET statement do?
These are all basic things you will use every day that you program. You have to learn them. Nobody can learn them for you.