<p>Go grab any basic book on C or C++ programming, download yourself a free compiler or an IDE like Code Blocks or Bloodshed, and complete the book. If you absolutely hate it, CS isn’t for you.</p>
<p>The great bulk of what you’ll be doing as a CS major is software engineering (computer programming done right), think of it as applied computer science, because <em>real</em> computer science or “pure” computer science is a branch of math concerned with computation, algorithms, complexity, relations, etc. Read up on discrete mathematics, boolean algebra, predicate calculus, proofs, set relations, etc. See if these topics seem at least kind of interesting to you. A lot of the same techniques and mental muscles you’ll use for those topics will be used in applied computer science, AKA software engineering. To say nothing of elementary algebra.</p>