Ok, that is helpful info.
No, I don’t think this is realistic. Maybe for a certain age group who is just racing from place to place to get a picture for Instagram. But realistically, as a Day 1 after a flight from the west coast, no. You have to take into consideration the time to get from place to place, stopping for meals, waiting in line, etc.
I would do the river cruise on the evening of your arrival day. It’s a leisurely introduction to the sights, and especially beautiful after dark. You’ll see the Eiffel Tower twinkling as you go by. I like the 1 hour cruises that leave from Pont Neuf: https://www.vedettesdupontneuf.com/cruises/
Then the next day, schedule the Tower for late morning and the Louvre for late afternoon (check closing time and reverse the order if needed). Two hours is enough for me at any museum, but some could be there for days. Keep in mind that the Louvre is massive (over 650,000 sq. Feet) so plan accordingly. You’ll be walking a lot. If you happen to wake up early enough to get to the Arc on the way to the Tower, go for it. If you just want to see the Arc, not go up, you could take the metro over after the Louvre and see it lit up beautifully.