Preparing toddler for baby and easy transition advice?

So my son is 15 months old and I know there's not alot I can do at this age to prepare him for baby coming home. I'm 38 weeks and have been showing him his baby photos and then patting my belly and saying baby in the belly and he will touch my belly. I set up the bassinet and say thats for the baby and he will touch my belly and such. I bought a big toy for when baby comes home for a present. Is there anything else I can do at this age to prepare him? I'm trying to enjoy the last few weeks with him and hes great at independent play as we have been working on that. I just want to make this as smooth as possible, my SO has been home due to quarintine and will likely be home for a while after as well so he will be taking over alot with my son, I just dont want there to be jealousy while I'm recovering and adjust the newborn to breastfeeding and a schedule.