にほんごでかいています。
わたしわにほんごがまなびます、でもまだじょずでわありません。かんじわかれいますすべきですかいています。でものみひらがなとカタカナわかります、かんじわかりません。すぐににほんごをじょうずにはなします。
If you are able to read this, I apologize for how difficult it must be to read. I have been studying Japanese (self teaching) for only about two weeks, and this is my first time attempting to write anything.
Should read:
Title: "Writing in Japanese"
"I am learning Japanese, but I'm not very good yet. I understand that I should be writing in Kanji, but I only know Hiragana and Katakana, I don't know Kanji. Soon I will be speaking Japanese well."