Some ideas:
Check out Community Hall - they have crafts, arcade & video games, billiards, ping-pong, etc, plus DVDs to rent.
Sitting on the back balcony, or in the alcove below it, is so restful.
There is only one bank of elevators, but lots of stairwells that led to different places (they're fun to explore).
Try to eat at Big River Grill outside on the BW - it's one of our favorite things to do in all of WDW!
Stroll around Crescent Lake, stop into Sea Breeze Point (gazebo) & bask in the scent of gardenias.
Boardwalk Joe's has good margaritas, & Abracadabar is great for some adult time.
Movies & Morning Yoga are on the Village Green (the back of the resort). Check the Activity Board for days/times.
The Bakery now has chocolate & vanilla soft serve ice cream, & their freshly baked treats are really tasty!
The Screendoor sells some groceries, & you get the 20% Blue Card
DVC discount (excluding alcohol)- good if you only need a few things. Just like any other resort, you can place a grocery order with WalmartGrocery, Instacart, etc if you prefer. As mentioned, Speedway has good prices on beer.
Even the worst BW views are better than many of the best views elsewhere, so enjoy some time on your balcony.
While I can't personally attest to it, I've heard from quite a few people who love good pizza that the pizza window has vastly improved, & is worth a stop.
Fantasia Gardens is about a 10-15 minute walk, & so much fun!!
Try to walk to Epcot & Studios at least once. The walks are lovely.
Others have spoken to the area restaurants, but also remember that the Skyliner is also nearby if you wish for some yummy food at the Riviera.
And try to take some time to look around the resort lobby: the Nanny Chairs, the Hippocampus Electrolier (which had a globe with a time capsule inside, to be opened on 10/1/2021 - it's currently stored away), Lucy the Elephant (look for Mary Poppins!), the miniature carousel (which rotates & plays music), the Castle paintings, the Mutoscopes (flip-picture machines), etc.