I stayed at the Relais Christine - www.relaischateaux.com - on the Left Bank in July 2022. It is a beautiful boutique hotel with a fabulous breakfast each morning. The rooms - we had two - were like little jewel boxes. Soooo beautiful and quintessentially French!
I was there with my daughter and one of her friends when the girls were 17. We did all of the normal tourist-y things as it was the girls' first time in Paris. They loved the Louvre - particularly the apartments. Really liked Sainte Chapelle as well, riverboat tour, day trip to Versailles. I was on a mission to have the girls learn how to use public transportation, so one afternoon they looked up a list of the best macarons in Paris, then navigated us to probably 15 different stops by foot, Metro, etc. An unexpected highlight that I mentioned on another recent Paris thread was a food tour of Montmartre. We used Secret Food Tours and were very pleased, though there are many companies to choose from.
Have so much fun!