Fast Tracking WLS
My opinion is the worst thing that could happen to you is to be fast tracked at 18 and with a 40 BMI.
If they do agree to wls for you - I hope its a VSG and not RNY.
This is a very serious operation and an equally serious commitment to a lifestyle - for life.
I feel for you - its tough to be 18 and overweight. You are still growing both physically and mentally. I think this is a huge mistake and hope you get some counseling first
Good luck
Unfortunately they really is no fast tracking. Usually minimum a year from referral. The easiest is to take what ever appoitment they give you. If you are not looking for multiple appointments on one day they can fit you in. Strt by making positive changes and show that you can commit to life changes