South America itinerary for my first ever solo trip

Hi - I’m a 28F and am planning my first solo trip through South America this summer. I start in Peru for 10 days with some friends, then for the next 3.5 weeks I will venture off on my own.

I’m looking for suggestions on places to go/things to do/see. So far I want to go to Santiago, Buenos Aires, maybe Patagonia. I’m open to city and nature both but I’m not super outdoorsy so I’m a little hesitant about doing Patagonia alone. I’d probably have to join a tour group or something there.

For context, I’ve traveled to 26 countries though mainly in Europe and the Caribbean with a handful of other random places. My Spanish is not bad, I can speak enough to get by.

Please let me know if you’ve been to many great places that were fun solo or have suggestions! Thanks!