Using the App "Human Japanese" on both the App Store and Google Play store is a good way to start. It is basically a digitised text book with quizzes at the end of each chapter. It also has recordings of pronunciations. It is around $12, but it is quite cheap compared to most textbooks (especially the one I had to get for uni). Flashcards is another very good way to remember vocab, kana, kanji, and even phrases/sentence structure. Flashcards are your friends! Use them! I personally use an app on my phone rather than physical flashcards. It is more convenient, saves paper, and is with you everywhere.

I'm learning myself as well, and I use the website/phone app Memrise, and am using the lesson "Learn basic Japanese" It goes through all the Hiragana and Katakana, then goes through a lot of important phrases and words for beginners. There's also many other lessons on there. がんばって！ Ganbatte/good luck. ^_^

First you must learn hiragana and katakana. For grammar you have PDF free versions of the books Genki I and II on the internet.

when it comes to characters just keep writing them down on scrap paper and saying them out loud, try too have fun with it... good luck dude!

all u need is the internet... start by youtube lesson with simple common phrases, then learn hiragana, then katakana, then u will be grade 1, then google grade 1 japnaese lesson and learn youre first 80 kanji and try use the kanji by making sentances, im almost grade 2 which is 160 kanji