I know the feeling, Serai. My one suggestion is to read some of her poems that really break up and slow down and work against the rhythm. Try "I know some lonely Houses off the Road," which is also just interesting because it's a different sort of poem for E.D., almost a narrative!

Not to get too technical, but as Robert Pinsky points out, "The Yellow Rose of Texas" is a ballad meter, alternating 4 beats with 3. E.D. wrote the bulk of, but not all, her poems in that meter, either common or ballad (the distinction depends not on the stresses but on the rhyme scheme I believe). Someone I'm sure has done the painstaking counting work of figuring out how many of each kind she wrote: hopefully they at least got a PhD for it!

So my suggestion is just to find poems that don't use that ballad or common, i.e. 4 stressed syllables alternating with 3. It's actually pretty interesting to start noticing which poems she uses it in, and which she doesn't, and to see if there is a difference in subject matter, mood, feel, etc.

Not to make a too attenuated analogy, but it's a bit like a jazz musician who takes a standard and messes with it. A bit, but not exactly like that. Just another thought.

Good luck!