The only baby readiness you need to get done is sitting down with your husband and talking about both of your expectations of life after the baby is born.
You both need to understand the roles you will play as you recover from pregnancy and childbirth.
You both need to understand the fact that in the early days you will be exhausted to the point where you will feel as if you have adhd and getting household chores done might be a huge challenge.
You both need to get on the same page about what 'maternity leave' means.
Does he expect you to get all chores done and have his dinner ready at 6pm daily, slippers and pipe laid out by his favourite armchair, and an evening in front of the TV de-stressing after his busy day?
Does he expect to come home and relieve you of the baby while you finally get to have a shower, perhaps day after day, for weeks?
Or cook dinner for you and then clean up everything afterwards while you deal with the late afternoon/ early evening crying jags that babies sometimes do?
Does he expect you to have a list of normal household chores he needs to do, or will he see what needs to be done and just do it, without needing a pat on the head?
Does he expect sex as frequently as before?
Who does he think will be in charge of keeping the grocery list current, etc?
You are letting him off the hook right now because of his stressful job, etc. This isn't the best way to prepare for the big change that's going to happen in your lives. You should both be anticipating more than one shift in every 24 hours. He needs to understand that he can't check out physically or mentally from baby and home care, and most importantly, care of you, regardless of his work situation.
I sense in your post that you're feeling a bit alone and anxious about your pregnancy even now - think about whether that's down to your husband's preoccupation with his job. Would you like him to demonstrate a bit more daily support or share your excitement?
The baby stuff, nursery decoration, etc, is immaterial.
You need to become a team and develop resilience as a couple or you will be miserable.