Before doing anything, read. Watch videos. Surf the forums. Read more. Google any bios names you are not really familiar with. Then go back and read everything again until you are fully tutored in just exactly what OC is what it does, what different settings do, what you can expect, how to test for stability, just what are the requirements for your intended level of OC....
The more you know, the better your chances of reaching your speed goals, with a stable platform and acceptable temps. OC is a hobby, not a necessity or a requirement with newer platforms, as as with any hobby, patience and preparedness are key terms. Jumping in blind will only get you freaked out when something unexpected happens, and it will.