Sleep train?

M2

LO will be 5 months on the 27th... I recently spoke with someone about letting their child sleep train and told them how my guy rolls constantly and gets stuck in the corner of the crib hitting his head or arm getting stuck in between the posts... anyone else with this problem? I'd love to try laying hom down and self soothe, which I have done a few times and it has worked... but he gets stuck a lot, making me end up rocking him or holding a paci for him until he falls out. Just needing suggestions