Your first line, onions peels. Do you need an apostrophe? Are you thinking an onion's peels, layers? Since you mentioned it a couple of times, it felt like it. As a reader it pulled me out of the poem before it could be made clear. Just a suggestion, it seems the 's' on onions should be taken off.

I didn't understand the bones still light. It made me think of osteoporosis. Two 'lights' in the same sentence was iffy.

I didn't understand most of the poem, that is the nature of poetry. The writer pours their heart and soul into it and the reader tries to understand.

I felt the deep emotion in it, despair. I really wish I did understand it better. The part about Mary Poppins especially intrigued me.

If you have the time, could you explain it to me?
Thanks for sharing.
love, LinnAnn