I'm 34weeks and 2days wen should I start putting the baby stroller and bed together

Right I only have 6 weeks left

My crib will be here tomorrow and it'll be going up straight away.

sooner the better. the later you wait the bigger you'll be and it'll be harder to do.

I need to know cause my husband is saying those things does not need to be up until he knows for a fact that the baby is going to be here and ready to use it

I already have my sons crib together, I'm waiting for the stroller..