I've just realised a couple of things that are difficult about 1st person POV:
1, We know from the off that the character didn't die because they're speaking.
2, Its past tense so the action feels a bit far removed.
3, Witholding information might make readers feel tricked. I want to hook people in, but then I'm getting the protagonist to pose questions that they already know the answers too.
Would being an unreliable character fix that?