What is the name of the dictionary app you said?

Thanks for sharing your experience, I know what's left for me to do.

I hope you the best for your learning.

As for the kanji... I know of some speakers who can simply get by without knowing too much kanji (met a couple of ex-soldiers who served their tours in Japan and some get by quite well without knowing how to read or write). But if you are studying on your own, I think you will have to start with the kanji one way or the other. Without it, you will find yourself not knowing the difference between two similar sounding words, or get bogged down reading/writing a long sentence with a lot of hiragana (there is usually no space between the hiragana words, and can confuse even native speakers).

The kanji acts like a picture that encapsulates the meaning of a string of hiragana characters, so despite all its confusion surrounding its use, it is an essential part to learning Japanese properly. If I can find a way around it, I'll be sure to let you know!

I think you should start with the Minna No Nihongo textbook simply because it is almost the default textbook for beginners (even in Japan). I find the textbook lacking in some details, so you can also try other textbooks complement the Minna No Nihongo series (I also recommend a good dictionary app on your mobile phone just to help get through certain words).

The Minna No Nihongo textbook will lay down the basic grammar rules, and they helped me tremendously for the first two years of beginner studies. The beginner course begins with two textbooks, one red and one blue- a total of 50 lessons. By lesson 15 you could start deciphering simple online news articles like the NHK Easy News website.  By the time you are at lesson 20, you will have enough grammar to try speaking with native speakers in simple sentences. 

I also recommend reading and listening anything to do with Doraemon (you know... the blue nuclear powered robot cat with a magic pocket on his tummy). This cultural icon appears in so many textbooks and teaching media, both simple and advanced, that I can't recommend it enough. 

Thanks again for those advice.

Do you learn only with My minna no nihongo textbook?

I started learning japanese few weeks ago, using internet only so I just know the kana and how to use them , yet I was just curious of the way kanji works and didn't seriously get on it.

Should I buy this textbook to begin with the grammar ?