Translate to Kanji

"At my core, there is not nothing. Neither is it a parched wasteland. "

"Lately I look but don't see, I look at everything without feeling. I feel so empty. "

私の中心には何もありません。
それも乾いた荒れ地ではありません。
最近私は見ていますが何も見えていません。
何事も淡々と見ています。私は虚しい。

Kanji is a name of one of characters used in Japanese. The rest is hiragana and katakana. Japanese sentences are made of these 3 characters. So no one can translate an English sentence to kanji.
If you wish the translation to be all kanji you should ask a Chinese person to translate it to Chinese. Chinese people use only kanji to make sentences.

私の中心には何もありません。
それは乾いた荒れ地ではありません。
最近、見ようとしても何も見えません。
何事も淡々と見ています。私は虚しい。

You also need to clarify why you need to be translated, what it is for, how the translation is going to be presented, and the context. Otherwise, people would interpret it in dozens of ways and another dozen of expressions, cool and mostly uncool.