If you have been here for long enough, 3 mon in CA is enough. You can file
divorce here.
LS's suggestion is good. family law facilitator's office will be helpful. If
you are a victim of domestic violence and low income. They will take care
of everything.
Whether or not the other party sign it immediately, the dissolution will be
effective 6 month later.
It sounds that your son is not born in the US. Then it is a little bit
easier for you to fight.