today i'm going to the seminar. just wondering how much do you have to weigh and what are the steps after the seminar?

Depends on your insurance company. They will likely have a threshold BMI that you must reach in order to be qualified for insurance coverage. The threshold also depends on if you have any comorbidities. The comorbidities they accept are diabetes, high blood pressure, high cholesterol, and sleep apnea.

Your insurance company will have it's own requirements of some, all or none of the following: sleep study to rule out sleep apnea, cardiac clearance, upper GI, chest X-ray, a visit or visits with a nutritionist, psychological evaluation, 6 month supervised diet, 5 year history of weight problems/ documentation of attempts to lose weight.

I see you're going to the seminar today/tonight. The surgeon's staff should be familiar with the requirements of your insurance and will guide you BUT if you have any questions at all, be your own advocate and call your insurance company and ask them yourself.