AR-11 is the correct form. They track by A number. Sounds like you are fine.
Remember that sponsors who have submitted an I-864 must report address changes by mailing an I-865.
There are scores of people in this very forum who have done it. Just be aware of the work and travel restrictions associated with adjustment of status.
Follow this guide:
To be honest, you face an uphill battle on several fronts. I have never seen a first meeting waiver granted. @TBoneTX is right. Chances are none. You have a difficult path ahead. Good luck.