add some leaves , i guess its fall for you in Maine just like here in the UK ,so that should be no trouble and also a couple of spades of soil .
the leaves will help dry the mix a little ,and the soil will have the bugs worms ,and bacteria to start the composting process.
Give it a good turn every few days ,don't expect a fast break down as temperatures are dropping now .
Do have a look at the compost mix sticky at the top of this section ,plenty of ideas there , my guess is too much water and paper.
You could also add some twiggy bits to help break up the texture and let the air in ! I like to add thin willow twigs ,they break down fairly fast and i have a plentiful supply from next doors weeping willow.
A gardener with a small shady back garden and a balcony with containers ,
biggest problem not enough sunshine !