Filled in the main grid, got the alleged hints for what's to be highlighted, though as each is an either/or I'm no further along on those, and the result from entering what I believe to be the correct characters in the bottom row (minus the abbreviation) leads me either to a particular model of Ray-Bans or Son Heung Min's annual salary, and not much else. And it's taken me 2 days to even get this far! I may have to concede defeat :/