My 8 month old has always slept in her own pack and play for the most part, but when we do have her sleep on the bed she makes me nervous so I looked up some bed sharing things on Walmart and they have like higher raised bassinet things that stretched further to grow with the baby. But honestly it’s worked each night to just put her in the middle with 7 comforters on the bed and pillows all around us and we lowered our bed lol and put blankets on the floor also just in case but so far holding her has worked because I’ve woken up whenever she does move. But I have her pack and play next to our bed, I’d maybe try having your son in it with some of your shirts or your blanket and pat them a bit each night before bed and see if you can maybe get him used to sleeping on his own if you can’t find a safe way to bedshare until he’s older