iirc there is a specific event for France that can fire:
https://eu4.paradoxwikis.com/French_Revolution
I've done my best to get it to start ticking but it won't.
The French Revolution overrides the generic Revolution disaster.
Basically, you have to wait for a Center of Revolution to spawn (its spawn place is random but it has a crapton of weights built in so you can kind of rig it to spawn in your lands; you want a province with high dev, university and to have as much absolutism as humanly possible). Once it spawns, the center will convert 3 provinces at a time (the conversion time is 33 days no matter what) and it prioritizes high dev provinces and provinces belonging to the country where the center spawned.
Once 20% of your nation has embraced the Revolutionary ideals (20% of your total dev but I'm not sure if LA counts or not. I think it does) the Revolution disaster will appear on the possible disasters tab. You COULD wait till 100% of your nation flips, which instantly triggers the disaster, but this would be ungodly slow.
Take a look at the disaster conditions. You want -1 stab, negative prestige, at least 25 loans (I think you get a bonus for having 50). All of this combined will start the monthly tick and make it progress reasonably fast.
My advice is to save ADM and MIL so that once the disaster fires you can instantly buy back stab to +3, thus ending the disaster and the MIL is to increase your rep tradition out of the gate so you will gain some zeal right away. You may also want to save 100 years worth of reform progress because the amount of reform progress you have to spend once you become a Rev. Republic is silly stupid.
The disaster itself is a piece of cake to deal with if you are prepared. When I tested out the French Rev. I kept the disaster going longer than necessary to see what events would fire. I got all the wait to Robespierre losing his head and thought the events weren't worth the wait and having to endure the massive unrest associated with the disaster but your mileage may vary.
Lastly, be warned that Revolutionary governments lose the Imperialism CB, which is massive.
P.S: Center of Rev. Will spawn sometime after the last Age comes online. Usually 20 or so years after the Age has started.