Is it possible to detect your speed relative to light?

Question

Let’s take two cases: (1) your velocity is constant and (2) you are accelerating.

(1) isn’t the answer no, like that’s a core idea of Einstein’s relativity stuff?

(2) I don’t know.

Answer 1

Light always travels at speed c, regardless of observer/reference frame. So your speed relative to light is always the same no matter what.