On a WHV and want to study Japanese.

Hi everyone, hope everyone is well

My girlfriend is moving to Japan for a year to become an English teacher and I plan to join her on a Working Holiday Visa so I can stay for the full year as well (we are from UK if that matters at all).

I have enough savings so I actually don't plan on working. Instead, I was planning to travel around and putting time into learning the language.

I've been looking at the language schools like GenkiJACS and others, but the 5-days-a-week schedule is a bit too intense for me, as it would mean I couldn't travel as much as I would like. I appreciate that a lot of these schools are designed to put people on a path to university or jobs etc, but I'm looking for something more casual of one or two days a week but don't know if that even exists/would be worth doing due to how hard it is to learn the language of course.

Thanks all