What I did when I was first interested in OC'ing my PC (2004) is I googled "guides to OC'ing xxxxx processors/socket" with the xxxxx being the processor/socket you own or are interested in. A lot of hits took me here to Anandtech and I began my research. I would say for about a month or so, a few evenings a week, I would read till my eyes hurt on all the terms, methods, ins and outs of OC'ing.
With plenty of research and reading/learning you'll really be thankful once you start the process. Good luck!