Help with my itinerary in Peru, Bolivia, and Chile

Hello, I am a 20 year old male who is planning on traveling to Peru, Bolivia, and Chile after my summer study abroad in Buenos Aires

I have formulated a rough draft of my itinerary, the only thing I have booked is my 4 day Inca trail tour. Aside from that, everything else is up in the air. I really am looking forward to seeing Salar de Uyuni, Lake Titicaca, the Nazca Lines, Amazon Rainforest, stargazing in the Atacama, and much more

I have about 6 weeks with a bit of wiggle room with some extra days, especially after the Inca trail hike. Here is my itinerary, I am open to any criticism and ideas for other locations

Fly from Buenos Aires to Lima

1-3: Lima

4: Paracas

5:Huacachina

6: Nazca and overnight bus to Arequipa

7-9: Arequipa, overnight bus to Cusco

10-14: Cusco

15-18: Hiking Inca Trail, spend night 18 in Cusco

19-22: Puerto Maldonado Amazon tour, spend night 22 in Cusco

23: Sun route to Puno

24-25: Taquile Island overnight tour

26: Finish tour, overnight bus to La Paz

27-29: La Paz, overnight bus to Sucre

30-31: Sucre

32: Potosi

33: Uyuni

34-35: Salt flats tour

36-38: San Pedro de Atacama, flight to Santiago from Calama

39-42: Santiago