>>/13814/
I download Anki, download a pre-made deck filled with the top X thousand most frequent words and then I learn 20 new words daily
thats basically it. eventually you know enough words and have seen the grammar enough times that you just get it
20 new words daily (and the old ones coming up for repetition now and then) took about 30 min for portuguese cus you only had to memorize the meaning
for kanji its a different story but its doable, just takes longer to remember