Advice for a language school as an european

Hello,

I've seen already a few posts on Reddit, including this sub, but I'm never sure that it applies to be.

I'm trying to find a nice language school in Osaka (specifically Osaka), knowing that I'm French, but with an excellent English (fluent).

I'm currently holding a JLPT N5.

I'd like a school where there are other either europeans, or americans, or australians, in my class.
Also I really aim to study and improve my Japanese, and I would need an arubaito on the side.

I've seen that many schools have vietnamese / chinese students. I'd like to avoid that because they will know Kanji way better than me and also it would be nice not to full "too" alone as an european in that school.

So far I've seen YMCA, but I'd like to know if there are other / better option.

Thanks a lot for your advices folks !