Purchasing insurance to cover maternity leave in California?

"I acquired the vehicle last year"I would prefer to be on my husbands auto  insurance . He said no since his dad is about it and he was not gonna end lending his vehicle. A separate account for me would however open. I expected him to avoid financing the car he said no"My little girl is 10 weeks old
"Planning on investing in was thinking of purchasing a second hand one from a dealership as opposed to independently from a person and an auto soon