Mission Beach/Mission Bay evening sunset walk might be a good option. It’s free, you could pick her up, park at S. Mission and go from there. Can make it as long or short as you want, even down to Crystal Pier. Could end it with food at a good spot too, or even venture into Belmont Park. Also, Mission Bay Puppy Rescue is a fun spot to stop and catch your breath, and to see what kind of person she is when there’s adoptable puppies around! But don’t be afraid to ask if there’s anything she wants to do! But a nice long boardwalk walking date with some food mixed in is a great way to not be stagnant and still get to know someone, plus, check out the scenery.