What would you do if you died and reincarnated into a manhwa situation

Well, I had a dream about suddenly dying and becoming a dukes daughter in some weird isekai (well manhwa, but still isekai). So I was wondering, what would you do in the time period where there’s still like the duke/marquess thing (specifically the first thing but I would love it if you made up a whole freaking story for it). Just asking (yeah... not for a friend)