My! What big ears you have!
She does have a lot of bone, but she looks really good and stout, As long as she puts enough meat on the bones she'll be fine... I think she'll probably change color to something more like her mother.
I like starting to halterbreak early as well, this year I didn't get to it, but the 2 candidates I have are pretty laid back, and I do hold their head easily while giving them neck rubs. I'm sure the first couple times I'll have a bucking bronc with both of them, but they should get it figured out OK,.. they won't be scared at least