Basic English skills? Why would the prefatory clause limit the latter? Even the most left-leaning [current] SCOTUS justices didn't/don't attempt to make this argument.

'A well balanced breakfast being necessary to the start of a healthy day, the right of the people to keep and eat food shall not be infringed.'

Whose rights shall not be infringed here, the breakfast's or those of the people?

If it's talking about a vibrant system where everyone of legal age and health is armed and ready for battle, in regular military training exercises, regular militia duty.. then we don't have one here yet. We should have one like early America had, activated by statute.

"A well-balanced breakfast, being necessary to the health of a free State, the right of the people to keep and use Toasters, shall not be infringed."

Who has the right to keep and use toasters? The people, or the well-balanced breakfast?

> Which part of "well-regulated militia" is difficult to understand?

The word "regulated", which has no semantic overlap with the modern meaning of the same word.