Reading the archived R, RN, and BSA posts by clicking on the little blue initials at the top of the forum page (beneath the forum title) will provide you with a wealth of information. From what types of oils to use (there are a couple of oils that are not used for OPing) to the follow-up protocol procedures.
The links to oilpulling.com are also priceless. OPing is gentle, simple, and beneficial, but people new to this protocol must be patient. Some people experience immediate benefits. Others keep at it for months before they begin to notice better dental health, overall. This was first used as a dental health protocol, but so many people have reported additional whole-self benefits that it's quickly caught on!