Welcome! If I was in your shoes, then I would do what you are already describing, plus read a lot, plus be very mindful of test prep. Basically what Squintina wrote and that reading progression is great.
As far as I know, Malinkal has achieved what you want, although is also living in Japan, so ymmv: their log and 50 novels in a year post. Everything is documented very well so you can see just how much consistency, dedication and time went into achieving that.