Depends which world or earth we are talking about, doesn’t it? 
Many YECs don’t believe the earth is young, but that life is young. Have you heard of Young Life Creationism? See @r_speir…
Besides, you defined your hermeneutics a different way:
My concern about your interpretation is that it doesn’t take Genesis on its own terms. If you followed you paradigm more closely, an old earth wouldn’t be such a problem for you.