My experience with my own Osage logs are that you can't really tell what kind of staves they are going to make until you open it up....split it into staves. I seem to have gotten about 60% good staves to 20% ok staves, and 20% throw aways out of each log. It just depends on how they split as to whether or not they are any good. That log in the second pic looks like a double trunk at the bottom of the stump and that will have to be cut off, so take that into consideration when deciding which ones are worth your time and trouble. Obviously pick the straightest ones you can find, but again.....even though they look straight on the outside doesn't guarantee they are straight when you split them.
Pat said it right when he said not to worry so much about the twist, you can take that out later. I used steam to fix my twisted limbs on the longbow I built. I just put it over a big stainless turkey fryer pot with boiling water for 30min. then clamped it past the twist and left it overnight, the next morning it was all good.
Good luck to ya, and take your time you will get the hang of it. I'm still learning myself.