i'll share the process for my divorce (it was in NY state, laws where you live would be different)
i confirmed residency before i filed. we both lived in NY state for over 10+ yrs
my grounds for divorce was 'no fault', 'irretrievable breakdown of the marriage' (ny state recognizes fault and no-fault)
spent a great deal of time getting all the financial records, deeds to the property, prenup, etc. about 1 week
filed the summons notice with the county clerk office, paid the filing fee and got a case number
my lawyer served her lawyer the notice. in ny state only adults who aren't part of the divorce can serve notice.
my spouse had 20 days to reply b/c we were both in the state. i think if she was outside ny state she would have more time but i don't remember how much
if she didn't reply then the court would judge the divorce not contested. she did reply within a week and didn't contest the divorce
we settled out of court using our lawyers to decide on division of our assets and property. the prenup was helpful but i gave more that what was in the agreement b/c it was fair. really happy we didn't go to court
the court reviewed our settlement and issued the decree within a month, ending the marriage. i think the decree was done in a couple of weeks but i wasn't in a rush and when i went to the court house to get the decree document it was dated earlier
all together it was less than 3 months
the clerks at the courthouse were always patient and helpful on the phone and in person
get a good lawyer first. good luck