File a petition in the guardianship case and ask for it.

Here is a link to the support calculator: https://childsupport.ca.gov/guideline-calculator/

You would have to succeed in getting a Domestic Violence Restraining Order with a kick-out order and an order to pay spousal support.

You’ll have to file to get the.court to order it unless you can convince him that his possibility is impractical.

Do you have a court finding of the amount of arrears? If not, and you’re collecting independently, then I think you would need one.

Apparently, he can - although it wouldn’t be considered the best option. If they must share a room, the child should have her bed. It also isn’t...

That’s child abduction and illegal; there is a Child Abduction Unit with the DA if she should decide.

I suggest just not engaging with her ….

An infant needs frequent contact with both parents so initially you need to visit several times per week, and get used to feeding, changing, and...

You would have to petition for a guardianship and prove your dad unfit to parent.