>>46514554The others have given great advice but I just wanna chime in with my experience. I am never much of a disciplined guy, I've tried various flashcards and lesson programs to no avail because I myself can't commit to them in the long term. No point forcing a fixed regime that's not compatible with me. So while I have given up on them, I never stopped immersing myself in the language.
I went about it by brute force with continued exposure. Listening to streams, jp songs, reading news articles. Instead of using google translate or deepl, use extension like rikaikun to deciper word by word and understand the sentence yourself. Armed with google and various handy web tools like jisho I would search words I heard but did not know the meaning of by romaji, and add them into my own deck of words I added myself.
You can argue that this is only helping you for stuff related to holos and I think that's fine to start with, no one learns by picking everything from all fields of study at once. Understanding 99% of holo streams first would not be a detriment to learning the language further. Honestly at this point you're already good to go, since the next step is just an eternal, never ending kanji memorization.
This is a slow osmosis process that started from anime watching age but it doesn't demand anything extra of my discipline or time. I'm an アラサー ojisan now but I could understand all of the jp holos perfectly fine.