[header] How to study computer science [title] Check out free online courses. [step] If you cannot or don't want to attend an undergraduate program in computer science, you'll be pleasantly surprised at the availability of free coursework online. [substeps] For example, you can sign up for computer science related courses on coursera. 
You should also check out opencourseware from the massachusetts institute of technology. It is a goldmine of information for people who want to have access to computer science materials at an academic level without paying tuition.