That seems like a long time to be on Disney property with no car and no parks.
You could check on the resort (not
DVC) threads for Yacht & Beach Club, Boardwalk, and Swan/Dolphin. See what questions people are asking, walk over to the resorts, and see if you could find the answers for them. (People are often asking things like: Does BC Marketplace have toasters for guests to use? What are the current pool hours?)
If you have a favorite snack food, you could see what the offerings are in places you can get to without a car. So, for example, you could see what cupcakes are available at YC, BC, BW, Swan and Dolphin.
You could plan to visit a different hotel every day. See what the free activities are. Pre-COVID, AKV seemed to have the most going on. Also, see how much of a pain in the neck it is to get there on Disney transportation.
People might tell you to spend time at Disney Springs, but personally I am always disappointed when I go there, and I get motion sick on the bus from the BCV area. It seems like it's mostly expensive stores.
You could always Uber/Lyft/taxi if you want to get off property.