Now we know some more
That no one speaks French is not a problem at
Disneyland Paris. Nowadays almost all CMs who interact with guests will speak English without a problem. Everything is at least bilingual. Shows are build up in a way that Mickey speaks French, Minnie answers in English. There are a lot of repeats in the dialogue so you know what's going on.
If you have no interests in characters or shows, you should be fine with one day and using Premiere Access for some rides to get a taste of it. Most of the top rides are available during EMH.
Good to know, there are VIP services as well in DLP. No idea about quality, they are not used that often. You rarely see them in the park. If you can afford this, it will free up time to take breaks, have a table service lunch or dinner.
I am not 100% sure about the price, but before Covid I think it starts of with 1.700EUR for 5 hours.
https://www.disneylandparis.com/en-usd/tours/vip-tours/
Disneyland Paris only sell packages with room and tickets included, so when you book 1 night, you will get 2 day park access. You could arrive in the evening on your first day, have dinner, explore the park, stay for the fireworks and then the next day you'll know your way around the park.
Best thing to keep in mind is: Disneyland Paris is build with a French / European audience in mind. Things will be different. Do not compare too much about what is better, it is usually different. Like to us CMs in Florida can come across as fake and over the top, for US guests the French CMs can seem stoic.
Table service is a big thing in French culture, so you are never rushed, a waiter won't be at your table constantly, and you have to ask for the check yourself. Therefore, a table service meal in Disneyland Paris will take longer than in the US Disney parks.