BAH question

My army husband is currently in basic training at Fort Jackson we have a one year old daughter together and I am currently 8 months pregnant with our son. He has my daughter and I listed as dependents. I unfortunately have to move out of my parents house due to some family issues. I would like to learn more about BAH how it works and if I’d be able to use that to get a temporary apartment we live in California and we also have joined bank accounts. Any military family’s have advice for me?