I know a fair amount about divorces, Divorced once in USA and 2 times overseas,
In the USA each state has different divorce rules but they all follow the general format with some variances, Some states exclude your original wealth before marriage but and gains are 50/50. Other states just add up the total assets of the man and wife and then divide by 50/50. Children are required to be supported by the money maker the family and this also varies from state to state,
Now for some oddities, Sometimes the assets are small or tied up in that case a mintenance amount is ordered, This maintenance matches the lifestyle that the spouse is accustomed to living. This maintenance normally ends when the benefitting party remarries. If a lump sum is paid then there is normally no maintenance except for the children.
In general the courts will award the children to the wife unless you have been the house man.
It is essential to see lawyer and have an amicable divorce, Lawyers in a contested settlement can be very expensive. It tough going and I can only wish you a smooth ride with a few possible bumps on the way.