Im learning japanese, and i have the katakana and hiragana alphabet, im still getting it all memorized lol! I'm able to read most japanese but not understand it, (also Kanji im no good at), so if i dont understand it i'll try and find it out, then write it all down as study,

http://www.ibiblio.org/koine/greek/lessons/alphabet.html, this is the alphabet and the basics or pronunciation...or something, anyway i started my japanese with learning the alphabet, as its all 'symbolized' like greek, and unlike english, cant do anything without knowings whats what lawl! when your done with this site, go look around for others (oh durr)

あああ。。こんいちは＊＊　ごめんあさい　：）

どうもありがとうございます！

There never is a specific amount of time, nor will a foreighn language be able to discover everything about another, though it all depends on the person, such as how much theyre willing, how much effort, how much practice. It is a long process which will take a few years, (im still on my first year) but you do learn alot in each year.

Im not entirely sure, as im very very much a beginner with Kanji, but i have noticed that Kanji is used for many, probably all(?) Nouns and Pronouns, in other ways too, such as 私 (watashi=I) like i said though im not entirely sure^^; although i do believe that that is correct, i may be wrong but hope i helped in some way :[ lol