What would you change? Am I rushing it? Doing too little?

First time in Peru, but wasn't able to add Machu Picchu since tickets are sold out so I guess I have a reason to visit again ;) .

Oct. 20: Arrive at Lima 9PM

• Stroll around Miraflores and Barranco (expecting vendors, restaurants, live bands, fireworks, art shows, etc.)

Oct. 21: Transfer to Cusco

• Land in Cusco at 2PM 
• While in Cusco:
  • Saqsaywaman → get a picture on the Balcon del Diablo
  • Tambomachay → visit after going to Saqsaywaman
  • Basilica Cathedral (UNESCO site)
  • Temple of Coricancha (UNESCO site)
  • Mirador desde el Cristo Blanco (Open 24/7)

Oct. 22: Sacred Valley

•  Sacred Valley Tour

Oct. 23: Rainbow Mountain

•  Rainbow Mountain Tour

Oct. 24: Humantay Lake

•  Humantay Lake tour in one day

Oct. 25: Explore Cusco

•  Take the day to explore the different restaurants, markets, historical places, and ancient ruins

Oct. 26: Transfer to Lima

• Arrive at 8AM
• Take the day to explore the different restaurants, markets, historical places, and ancient ruins

Oct. 27: Paracas and Huacachina

•  Paracas and Huacachina 1-Day Tour

Oct. 28: Explore Lima

• Sites:
  • Huaca Pucllana
  • Basilica and Convent of San Francisco
  • Pachacamac Complex
• Activities:
  • Paragliding

Oct. 29: Depart Peru

Edit: Thank you all for your input. Based on what I read, it looked like I needed to give myself some more time to acclimate and that I was trying to do a bit too much. So, I completely revamped my itinerary (plus was also able to find tickets for Machu Picchu online). I removed Paracas and Huacachina (will do it another time) and added Aguas Caliente (since I was able to book tickets for Machu Picchu).

Thanks again for all your help!