Can't teach but can give tips:

1. Rote repetition of lists of words. That's all. There's no secret. Not pretty, but it's THE way.

2. Ignore "learn real Japanese" or "conversational skills" systems or memorization of phrases. You must read and write. No way around it.

3. Learn hiragana and katakana first and foremost before anything else. Shouldn't take more than a few days.

4. Focus on grammar, vocabulary can be looked up. Grammar is extremely simple and rewarding.

5. Kanjis are pretty. Kanjis are what SUCKS when learning Japanese. You will not learn how to write them, especially nowadays when no one writes by hand anymore. But you must learn to recognize them. Otherwise you won't be able to read jack, and even though you will think you know Japanese, reality will hit you fast. The basic 1950 or so kanji can take several years of hardcore focused daily root repetition of thousands of words. There is no way around it. Flashcards help, but can't replace handwriting and repetition.