STEP ONE: HIRE AN ATTORNEY.
Hire an attorney by signing a written fee agreement and paying a fee deposit and cost deposit, also known as a Retainer Agreement.
During the last thirty plus years I have seen many people inquiring about divorce and represented many. Articles written on divorce give many reasons, like lack of commitment, arguing, infidelity, marrying to young, lack of equality in the relationship, and abuse. The main reason has been finances. When people do not have money, they wind up seeking divorce.