Through reading LN text, I guess. I could skimp through half the vocab because of my Chinese background, but I can't admit that I am fully proficient in it yet. When you see a constant phrasing over and over again, it's best to search it up and see how it goes. Focus on the grammar first though.
Hey, nice to meet you.
I'd like to ask you something about learning Japanese. Can you tell me how did you study Japanese? I'm trying to study it currently, can you tell me some tips? How long did it took you to learn Japanese?