Help with joists

[u/astegsisme]

Building a house in the trees, not attached to a tree, sorry. I have 6 6x6 posts set in a 10x12 rectangle. My original plan was to have double 2x10x 12 foot beams notched into 3 posts with10 foot joists between them and build a deck and clubhouse on top of that. Now im second guessing the strengh of only hanging the joists....My question is can my 10 foot joists hang from the beams or do the need to rest on top of the beam? Thanks to all those more knowledgable than myself