The first suggested step is to find competent counsel and seek advice as to how and when to proceed.
There is a minimum waiting period of six months. The waiting period will start when one party has filed and caused the paper to be served on the other party. That is called the "date of service."
Even if the case settles in the first month, it is necessary to wait an additional five months before you will no longer be married.
Cases that are litigated can take much longer than six months, depending upon the sophistication of the issues and any related problems in the case.