Good to hear it, good luck on the interview dude
Also, how long do you learn Japanese to reach level of proficiency that is translating interviews? That isn't an easy job for sure.
I studied Japanese for four years in university, with one of those years being in Japan. And then for the past two years I've been studying just on my own. I did a lot of self-studying when I was still in school, too, but that was mainly to push myself into really understanding the language beyond what the textbooks and tests required. Nowadays I mostly self-study just to learn the last little bits I don't already know, so it's a lot more casual by comparison.
Everybody kind of goes at their own speed, though. I don't think my Japanese has significantly improved the last couple of years. It's just mostly been refined. I was already pretty comfortable with it after three years of pretty intensive studying, although obviously I'm glad I'm still continuing it today. I've heard stories of learning it really quickly by just studying constantly 8+ hours a day everyday, but I like to stay sane, so I took it a little slower, ahaha. If you're studying it at a university level, you can be very well off after three or four years as long as you're good about studying constantly and more than just what you're required. I know other people my age that already over there working translator positions and whatnot, so you can accomplish quite a lot just a handful of years after starting. If you ever want advice on specific aspects of how to study it, don't be afraid to PM me.