Whoa, slow down!! :D You have a lot of research to do before deciding whether this is for you. You just discovered it yesterday? Have you ever considered weight-loss surgery before that? I can understand your enthusiasm but this is a very big step and not one just to take lightly.
But to answer your questions, how you proceed depends on your situation. If you want insurance to cover it the usual place to start is with a physical at your primary care doctor. Make sure you get the diagnosis of Morbid Obesity into your record. Then see a bariatric surgeon who performs the surgery (visit
www.inamed.com for names in your area). Whether you need a referral from your PCP or not depends on your insurance plan.
The surgeon will examine you and let you know what pre-op testing or procedures are necessary, and will make the request for precertification from your insurer. If all signals are go you'll be on your way.
If you're not going through insurance you just call an appropriate surgeon and make an appointment. Good luck!!