basically, the best thing you can do is first search the tutorials for basi computer security information... like firewall usage and stuff like that... tcp/ip is also a good one to learn about.... once you have the basics, i would just pick areas that interest me, things that i really want to know about and ask about them... i don't know what you want to get out of being here. you can go from a basic security stand point, an analysis stand point, a programming stand point, etc. there is no limit to the things in computers that you can learn about, esp here. there is a wealth of knowledge in all the fields here. so just pick some, and start reading and asking. but your first and best bet is to learn the basics... basic commands, basic protocol, learn about all that stuff first then you will have abetter idea how to make your box secure as well as learn what you are interested in.