Could be fun to you, but the Destiny narrative is from the PoV of the same guardian. It’s not a story about all of us, its just “the guardian” so writing lore for your characters specifically would apply to all of us, so we probably won’t agree with what you came up with as we don’t resonate with it. I say never give up on being creative. Never stop. But if you want everyone to like it, of which you made no mention but I do include it because you ask this question, you might want to consider writing up lore not associated with you personally.