I completely agree with Wiha about learning hiragana and katakana. Soon or later you have to learn it so might as well do it at the beginning. In my opinion learning and using hiragana and katakana from the get go, will help you to have a better pronunciation because you are not trying to use ENglish to pronounce Japanese phonetics. It is a bit confusing at first remembering those strange looking characters, but soon it will become second nature to you. I would recommend http://www.japanesepod101.com/. They have free lessons, but if you pay for basic subscription, you will get amazing amount of content. Each lesson is short and they have stuff for absolute beginners. A free online grammar reference guide can be found at http://www.guidetojapanese.org/learn/grammar Japanese grammar is very different than English, at first when you read this site it may be too overwhelming, but as you improve, come back from time to time and review the basic grammar, this will give you an overall understanding. I hope it helps!

I'd say hiragana and katakana are important so you're not relying on romaji all the time. They're both pretty straightforward and will not take much more than a week each to learn. Then learn some basic grammar and kanji for the common verbs and adjectives - like see, talk, hear, buy, big, small etc. Once you've got some grammar down, you can look for vocab to plug into each formation. Good luck, there's lots online to help you! 頑張ってください！

http://www.learn-japanese.info/lesson01.html

Basicly only undestand basic commication use Stuation training at hotel at airport etc but learning Full academic Japanese is not easy so your needs is just conversation watch animation is best many amimation is change your language but Aademic Japanese start with not fun need long time start with basic training. Japan foundation give you easy japanese studies and NHK World radio give basic japanese lesson let try it