YOU SAID:

i am at the pinnacle of my age

INTO JAPANESE

私は私の年齢の頂点にいます

BACK INTO ENGLISH

i'm on top of my age

INTO JAPANESE

私は私の年齢の上にいます

BACK INTO ENGLISH

i am above my age

INTO JAPANESE

私は私の年齢より上です

BACK INTO ENGLISH

i am older than my age

INTO JAPANESE

私は私の年齢より年上です

BACK INTO ENGLISH

i am older than my age