You could start with a dream sequence. But it should be eccentric and megalomanical.
that's my kind of stuff, anyway.
Make my imagination, as a reader, go wild!
If you stuff like....someone who the MC loves, falling down a precipice or saying hello, and then the MC wakes up and it's revealed to the reader that the loved one is dead....I roll my eyes, honestly.
But it's YOUR story, lol. Write whatever you want!
Perhaps making your characters fears and likes and dislikes into eccentric stuff like the cat from Alice in Wonderland would be interesting.
But if that's not how you tell your story, then so be it.
You are YOU.