>>106815630I wanna add something to this actually. I feel it has become substantially easier to go into native language content today. Back then I had downloaded lots of raws, but there was nothing in terms of Japanese subs. Also no hover dictionaries like yomichan or comprehensive online grammar guides.
I still have physical editions of the dictionaries of japanese grammar at home, but looking stuff up there is just a fucking pain. Same for looking up unknown Kanji.
The tools today just facilitate engaging with content much earlier and it helps a ton. Setting up your whole learning environment correctly in the beginning and knowing which tools to use is probably the most essential thing you can take from the guide in the OP. Afterwards you have to figure out your day to day routine yourself.