Regardless of past, current or future animosity levels, you really need to engage experts when dealing with life changing events such as divorce. You can still be friends but there are a multitude of considerations in a divorce that you may not consider right now but do need to consider whether you like it or not.
I am in the separation phase of an ‘amicable’ divorce but without the guidance of my attorney I would have endangered my future and tied my fortunes to someone whose interests are not my own. Indeed I’m dealing with the ‘please front me some money’ call I received today that I really don’t want to deal with.
You wrote on this board asking for advice. That advice from me, and some others, is to engage some experts for you protection. You can be fair but you have to be sure you don’t fuck up. There are no do-overs.