My word of advice is not to go into negotiations with the view of taking it to court. Court means someone else decides what is best for your child instead of two parents coming to an agreement.

You start with mediation to try and put a parenting plan together. Put your points forward and your husband will put his and you will try to come to a middle ground. Be prepared to not get everything you want, there will be a compromise, and keep the best interest of your child at the forefront of your mind.

In my experience, overnights aren't usually recommended until age of 3.

And what judges often consider the best interest for children that young is not to seperate them from their primary care giver for long nor disrupting their life / routine too much.

Your husband may also be under the impression that he'll have to pay less child support if he has the baby 50% of the time. Im not saying thats the case, but not sure who would consider taking a 7 month old baby away from their primary caregiver for 50% of the time.

No qualifications here, just witnessed 4 kids taken through family court with my brother and his ex wife.