How to say “My grandfather never took a lesson in his life — he played everything by ear.” in Japanese

In Japanese

うちのじいちゃん、レッスンなんて一度(いちど)も受(う)けたことないのに、何(なん)でも耳(みみ)コピで弾(ひ)いてたんだよ。

Uchi no jiichan, ressun nante ichido mo uketa koto nai no ni, nandemo mimikopi de hiitetan da yo.