Once TPR happens, how long does it take to adopt?

I was told our case would take a long time. They are telling me that hopefully adoption will finalize by next Oct. The permanancy hearing is Dec. where the judge will sign TPR. I know there will probably be a trial on the mom. Dad has agreed to relinquish. I was told once our cw types up about 20 pgs of the case, it will go to the AAG (after being signed by the judge). She told me there is about a 6 month back up rather than their usual 4-6 week! We would be concidered an "adoptive placement" officially after Dec., and after recieving current care-taker status.