when they say c.s., do they mean a coding language? if so, which one(s)?
You might check out the astrophysics package for Python and see if it looks interesting. Python is a popular language these days and it is free. A lot of scientific work is being done with it.
You might find the following clickable list of links useful or at least diverting:
Here are two versions of Linux (freely downloadable) that are designed for scientific research (the second one is oriented towards bioinformatics, but still interesting)
I recommend poking about the distrowatch site just to see what you find. Its a fun way to burn off quite a bit of time.
Separate names with a comma.