In fact, there is nothing wrong with these two understandings, and I still know nothing until now. This is definitely right, so I won't say it;

I didn't know it was okay until now.

at present

I didn't know until now, but from now on, it can be understood that I did it, so it can be translated as I didn't know until now. This is very similar to wonder. It means you want to know, but you don't know, because you want to know, which means you don't know (you can find it online).

Similarly, I didn't know it before, so I can say I know it now!

Just have a good experience.

I don't know if you are a high school student. This is equivalent to the sentence pattern of not ~ ~ until ~ ~ (although there is no not, nothing means no), which means it has not arrived yet.

no

know

this

be

important

until

speak

also

More! )