Applying for a Chinese Tourist Visa (I'm an Irish Citizen)

Hi, I need some info on applying for a L type, ideally I would like to be their for 2 months, is this possible?

Do I have to book ALL of my accommodation before I leave? For the Itinerary do I have to stick rigidly to this or can i divert from it when I get there? When is the entry permit activated from? Thank you in advance