NewbSorry

Hello I have a very strong background in Mathematics. The problem at this point is I have very little knowledge of Computer Science. I'm beginning to believe the future requires a stronger understanding of Computer Science. I'm starting this thread with the hopes some members will be able to point me in the right direction in terms of textbooks to use to begin learning about Computer Science. I know Computer Science is a pretty broad term. So, specifically what I would like to learn is how to manage privacy and security on my own. I have read too many articles regarding Apple, Google and the like using information from searches to even personal e-mails to accumulate information and market to third parties. I deplore that kind of invasion of privacy and I would like to learn how best to keep my privacy protected. Keep in mind, I have nothing to hide but still if this trend continues who knows who will get there keyboard on personal information. Currently, the only way I protect my privacy is to not have any social networking accounts, use Norton products for antivirus and security, use the internet minimally to check the news, and I have a GMX account instead of a G-Mail account. I'm pretty certain to most of you my attempts at privacy protection are laughable. So, can someone guide me to what books I should read to learn how to maintain my privacy? If my question is still to broad or does not make sense, please ask questions and I will clarify with the little knowledge I know. Thanks