Hello warmanw! Nice to have you here ๐
I suggest you have a look at the cheat sheet: Spine: Cheat Sheet
Especially the keying section:
K Key all changed
L Key active transform
CTRL+L Key all transforms on selection
CTRL+SHIFT+L Key all keyed dopesheet items (Key current pose)
I usually press SPACE to deselect everything so that I can see the whole dopesheet, then press CTRL+SHIFT+L to create keys on all the currently visible timelines (that is to say, all timelines that have a property keyed!) copy them, undo the creation of keys, then paste in a new animation ๐