There is no reasonable explanation for your theories though, they just don't add up. Especially the glaring hole of spoilers:end of spoilers
it being basically not possible for Wanda, who's been an orphan since ten years old in the middle of nowhere, to have preternatural knowledge of:
* How her powers work (especially since the majority of this episode is her being told by Agnes about what her powers are)
* The Infinity Stones existing
* What they do
* That Hydra has one
* That she can absorb it's powers with her own magic powers (magic powers that she also does not know she has).