I would love to try to put my grammar/flash cards aside and go the Harry Potter route.
I can't code. What could you do to help me, an average user, do this with Korean?
I think just go get copies of books you know well, or childrens books (harry potter, the little prince) and start reading with a dictionary or wordreference near by.
You could also pick up a frequency dictionary if you just want to build a base level of vocabulary.
I guess there are many people who would benefit from this idea and, like you, can't code. It sounds like a good idea for an Internet service - a list of words to check before reading book X in language Y.
Korean is opaque, and though I have a book of the 6000 most used words in Korean, I don't find it very helpful when picking up a children's book, for example.