ANSWER:
This is too late as you are already married.
It is prohibited for you to work in a mixed environment with men.
It is prohibited to work if he doesn’t want you to work and you didn’t stipulate this in the marriage contract.
He is obliged to take care of his family and what suits him as a husband and the breadwinner. Your son is none of his concerns.
Try to put your son with your parents so that he can get a better education in case your husband insists on going to that remote area.