We thought arriving after a 9-hour flight, it would probably take us at least an hour to get to the hotel and settle in
I always allow closer to 3 hours from landing to hotel- it is often a bit less but not always!
We never sleep on overnight flights no matter how hard we try- if we can get into our room and that is iffy with check ins normally after 2 pm- we do take a quick nap- set an alarm for about an hour. That is enough to take the edge off- then we are starving- head out to the closest cafe and have lunch. Then we walk- stay outdoors in the sunshine as much as possible (IOW no museum visits).
Last trip to Paris we stayed in St-Germain area, just off Rue de Buci- after that quick nap we had lunch, visited Notre Dame, Holocaust memorial behind the cathedral, did most of RS Left Bank Historic walk and worked our way back to hotel to change clothes/freshen up for dinner.
After dinner took a boat cruise on Seine- that is always an enjoyable experience and a good thing to do on first night. Fantastic views of Tour Eiffel, and if it is late enough you will get to see the Tour sparkling. (In fact we like this better than a climb to top)
We have used this company twice- no need to book in advance.
https://www.vedettesdupontneuf.com/home/
First trip to Paris we had our 20 yo daughter with us- she was an Art History major (now has her PhD!) so museums were big on her must do list- but other things she enjoyed- in no particular order ( if she could have spent every waking moment in the Louvre she would have)
Musee d'Orsay, Pere Lachaise , Sainte Chapelle, just wandering neighborhoods, people watching, popped in to 2 big dept stores-Galeries Lafayatte Printemps, Opera House, RS Marais walk, eating crepes from a sidewalk vendor, having chocolat at Angelina's.
We walked the length of Champs Elysees- and honestly it was a waste of time.
Montmarte was just OK- we really didn't like it as much as we thought we should/would.
On our more recent trip we gave Montmarte a 2nd chance and concluded we were right the first time. It's a long hot crowded metro ride to get there and it was just not enjoyable once there. Crowded, touristy and really quite sketchy. YMMV
Versailles was a long all day trip for us- we left on early train 8ish I think and did not get back to Paris til well after 6 pm-completey exhausted. I don't think you should plan much else on that day.
You didn't mention where you are saying?