As was stated in a previous comment:
http://www.guidetojapanese.org/learn/complete
is fantastic.
Learning kanji is daunting, but the earlier you start the better (even if you take it really slowly).
Some people hate it at first.
Hiragana and Katakana will come first, so when you learn...
あいうえお
or
アイウエオ
or
a i u e o
Why not slowly start tackling some basic kanji like:
一 二 三 四 五
Which are the characters for
1 2 3 4 5
いち に さん し ご
ichi ni san shi go