I’m writing a book that while certainly fantasy, is set during the Napoleonic Wars, with the protagonist being a low ranking officer in the French army. I’m looking for books, articles, and documentaries that catalog the timeline and campaigns of the Grand Armee, anything that details how regular soldiers would live and spend their off time, the duties of lower end officers (Lieutenant/Captains) and how french citizens would be living (specifically in Paris). I want to be as accurate and true to as much of history as I can be.
Not sure if it will fully cover what you're looking for, but have you taken a look at our reading list? https://www.reddit.com/r/AskHistorians/wiki/books/europe#wiki_the_french_revolution_.26amp.3B_the_napoleonic_wars
These are books from my own collection, or ones I've read:
The seminal work on the Grande Armée is John Elting's Swords Around a Throne, and it sounds like exactly what you're looking for. Gunther E. Rothenberg's The Art of War in the Age of Napoleon is another good overview of the general state and development of warfare from 1789 to 1815. David Chandler's The Campaigns of Napoleon is an excellent book and the most comprehensive history of its subject, but it's over 50 years old by now and out of print, which means you'll need to try to get lucky with a second-hand copy.
Napoleonic war memoirs are also relatively common in translation - Marbot's is a seminal one, and others from all levels of French society are available. As sources for the fine detail of major decision-making, they're unreliable at best, but they give a good texture of the period and how contemporaries thought of it. Rifleman Harris' memoir, while British, is another good example.
Most of the accessibly scholarship on life in Paris and France more generally is focussed on the earlier, Revolutionary years: here Liberty or Death by Peter McPhee is excellent, and Simon Schama's Citizens: A Chronicle of the French Revolution, while dense and rather controversial, gives a good snapshot of the experience of living in Paris. The sections in Colin Jones' Paris: Biography of a City are also an excellent walk through the city.
Finally, R. F. Delderfield's The March of the Twenty-Six, Ian Davidson's The French Revolution: From Enlightenment to Tyranny, and Adam Zamoyski's 1812: Napoleon's Fatal March on Moscow and Phantom Terror are books I'd hesitate to cite, but as inspiration for fiction, they should serve you well.