Group Health - Medicare

Hello,
I am curious if anyone has experience with Group Health - Medicare. I have an appointment with a case manager on the 10th of October and I am not a patient person. I was wondering what to expect and how long the process might take till I can set a surgery date.

I have been battling my weight since I was in Kindergarten. I am tired of being obese and I feel like if I don't get this done I won't live very long. My BMI is above 60 and I am only 44. I have sleep apnea, High A1C, arthritis, and high blood pressure.

I am basically worried about passing the psych eval. If anyone has any advice I would certainly appreciate it.

Thanks,
Mo