Although Linux is freely downloadable from the Internet, many people buy Linux as part of a distribution. A distro allows you to get the Linux kernel as well as tons of great utilities and other software.
Some vendors also provide some level of installation support with their products.
One of the greatest strengths of the Linux community is the users. These forums allow users to exchange ideas, offer advice, and to help new Linux users with their systems. Some may envision Linux as a command-line system, reminiscent of the Unix systems of old. However, the modern Linux has a wide array of graphical interfaces, office suites, communications tools, programming environments, and much, much more. We encourage you to use your favorite internet search engine to search for 'linux'.