You're close.

You're going to want to change your code from

popped_messy_list.insert(0, 1) = messy_list.pop(1)

to

popped_messy_list.insert(0, messy_list_item_popped_at_particular_index) 

Where 0 is where you're inserting the popped item and messy_list_item_popped_at_particular_index is the result of the popped item at the given index.