Ok thank you, it seems I need a lot of practice to get the hang of it! Thankfully my next blanket is also a baby size!
The AccuFeed isn't intended to pull. Its purpose is similar to a walking foot - to keep top and bottom layers moving in unison. You still need to make sure there is no tension on the quilt sandwich or resistance due to its weight as it feeds into the machine.
Not only should the bulk of the quilt at least be in your lap, but you should also lift it up at the front so it's not dragging as it's being quilted.
I have quilted a 96 x 96" quilt on a Janome 7700, which has a similar AccuFeed.