Divorce when suffering PPD

I have been suffering from PPD which is worsened by feequenct conflict in my marriage. The constant thought that my husband is always on his family's sides instead of me and his family's behaviours which may give bad influence to my son just too overwhelming to dismiss. I am a PR and I have been unemployed for almost 1 year. He used to see me feeling stressed out from past work and often use it as a threat to label that my mental is not stable hence he will fight all out for our son and will not let me take care of my son because he was scared my son will have a depression as well. Actually even though I was depressed but I did not go to the extent of harming myself or whatsoever, it was more on withdrawing from everything and I did not consult any psychiatrist in the past. On the other hand, he has also been showing mental instability when we had fights like slapping himself, threatening to jump down from our house, to leave the house etc. His family believes in physical punishment and I witnessed before his eldest brother slapped his two sons really hard which traumatized me and made me overvigilant. I may be having constraint financially and I need supports on how to move forward. I am waiting for a job offer but even if I get it, I do not know if I should take it or i should focus settling my divorce. Appreciate your sharing in advance.