@maxdancona,
The first step for getting a divorce is sitting down with a divorce attorney. Many of them will give you a consultation for free... but in my experience it is better to pay for an hour of their time. If it is free, what you get is a sales pitch, if you pay the lawyer will be there to answer your questions and to come up with a plan.
The major parts of my divorce were; division of property, discussion over custody of the children, and child support/alimony. The divorce is official when there is a written agreement that discusses these things.
In our case, division of property was fairly straight forward. The most difficult part was agreeing on a "parenting plan" that outlined where our children would be living, spending vacations and some agreements on how we would raise them.
We started out with the idea that we could have a "amicable" divorce with a mediator. That broke down fairly quickly. So we each got lawyers.
The judge appoints a negotiator whose job it is to make sure the judge doesn't have to do any work. The negotiator made it clear that she would report to the judge which side was being unreasonable... a pretty clever tactic to make sure that we would both be reasonable (no one wants the judge to be annoyed with them).
After we went back and forth on version of the parenting agreement, and some dickering over cash payments, we came up with an agreement. It went before the judge who took 5 minutes to approve it.
And we were done.
After that, it is over. You start over as a single person. You take care of your kids. You build new friendships and relationships. And, you move on.
As I have said, I have yet to meet a person who has regretted getting a divorce.
It starts with talking to a lawyer.