Love that you're trying to keep her entertained! This is a difficult situation since it's always best for them to have a pier, but I understand why that can't happen just yet. I would say just give her as much enrichment as possible. There are many YouTube tutorials on homemade toys made using things around the house. I use things like cardboard tissue boxes, newspaper, cardboard from toilet paper/paper towel roll, etc.
The other thing you'll want to do is give her floor time so she can exercise and explore. There are also lots of tutorials on how you can do this without ruining your carpet, hardwood, or tile (guinea pigs can be quite destructive and need to use the bathroom too). But since she is very new I would let her adjust to her main environment a little while longer before doing this.
Finally, when you are able to fetch Penelope a partner, please try to avoid stores. They try to cover this up, but when you buy a live animal from a pet store it is basically a guarantee that that animal was born in a dirty mill which will be further supported by your purchase. It sucks, I know, and I would recommend doing more research on this topic unless you're quite faint of heart because it really is disturbing. Shelters might be few and far between but usually, they will offer the option of a 'playdate' so that you can see if your two pigs are a true match for each other—which will be VERY important later. You do not want to get stuck with piggies that resent each other, and bringing a random pig home from the pet store increases those odds.
Hope you and P can entertain yourselves inside!
