I live in Japan and am still working on my Japanese.
I agree, at least 1 hour a day every day and none of this “5 days a week” thing. Study every day! The more you study/use it the better it will get.
And be prepared to reach a “learning plateau” after you have learned the basics and are getting into the more complex parts of the language. At this point it will seem like your progress is nil but you are learning albeit much more slowly.
If you are near a university or college that has an ESL program you may be able to meet a Japanese speaker and swap language learning.
Written Japanese is a nightmare of scripts. There are four forms to remember and all four can appear in a sentence. Romaji, English letters, is around and is used in a lot of places but there are two types of Romaji styles and one can be confusing to the learner. Katakana, a simplified form of Hiragana, is used mostly for foreign words that have become popular in the Japanese language, pronunciation of these words can be markedly different.
Hiragana, I was informed that this is a simplified form of Kanji, is fairly easy to learn with a few exceptions. It is used extensively where Kanji isn’t.
Kanji, chinese characters, is one of the most difficult things to master. My high school students tell me they have to know about 3000 Kanji for their final exam and for the university entry exam. The average Japanese uses about 2500 characters or less. There are many more and it really requires a great deal of practice and memorization to learn enough to be a proficient writer of Japanese.
I studied Kanji every day for two years and I would be lucky to know 50. I may have about 25 I know sufficiently enough to be able to read them, some I can write, and another 10 or so I recognize but continually forget them. All this after living here for 9 of the last 13 years.
My advice, move here, take an intensive Japanese course here, meet a Japanese person and have them coach you through this. You can do it if you want it bad enough. There are many foreigners here who can speak Japanese extremely well.
Good luck.