Learn Japanese Software
Try to make as many friends with Japanese people (or at least those who speak it efficiently) as you can. Because it is them from whom you learn the proper usage of Japanese language in day to day life. And once you know the proper usage in speaking, writing is no problem learn Japanese software. Then you only need to master a few alphabets. Actually, be it any language, even your mother tongue, you first learn to speak and much later, to write. So, follow the natural path.