I am afraid my 2yr old is gonna break the baby's stuff before he is even here. It's gonna be so hard…

I am afraid my 2yr old is gonna break the baby's stuff before he is even here. It's gonna be so hard keeping them away from each other every day which I am certain I will have to do... He figured out the baby swing swings, so he was swinging it super hard and running into it on purpose and falling down. He only swung it harder when I put a baby doll in the swing and told him to be careful, "don't hurt the baby, be nice to the baby, the baby likes to swing slow". And he will be all nice and rub my belly and then start hitting my belly and head butting my belly. Hanging on the babys pack and play and going nuts. Omg. I can't wait until we start speech therapy in December, but he currently doesn't say any words or communicate any needs. He just babbles and throws tantrums and I am trying my hardest to explain there is a baby coming but he just doesn't understand.