Computer Science is basically just a Frankenstein amalgamation of interconnected subjects related to computers that have been useful for universities to lump together for teaching and/or funding purposes. I have a Bachelor’s degree in it. Most of the courses were split between either more “theoretical” / math-y courses on discrete math, probability, “Theory of Computation”, etc. (where we were mostly solving math problems/writing proofs) or practical programming courses on things like “Intro to Java”, “Debugging”, and “Software Engineering Best Practices”, etc. (where we were mostly writing programs). Some met in the middle – e.g. Algorithms, which got into things like graph theory and complexity classes while also requiring us to write programs. The traditional “hard” courses also included compilers and operating systems where we were supposed to learn enough to build at least toy versions of both. I also had digital logic courses that got into to the boundary between programming and electrical engineering (but without going too deeply into how electronics physically works or is manufactured) – e.g. covering logic gates, state machines, the design (but not physical implementation) of CPUs, Verilog, etc.
Basically a “computer scientist” is someone who does something academically interesting about/with computers – either on the mathematics of what can be computed, or on the practical applications of computer technology. Most people who study it go on to become professional programmers rather than academics though.
As others have noted, you can use the
mountcommand from the terminal. On Mint, you should also be able to use the Disks utility that ships with the OS if you’d prefer to use a GUI.