If I did not like doing it, there would be no chance for me to be able to continue doing it.
It would not be possible for me to keep doing it if I didn't like it.
ご質問ありがとうございます。
① "If I did not like doing it"＝「もし私がそれをするのは好きでなければ」
"there would be no chance for me"＝「それには私にとって可能性はゼロである」
"to be able to continue doing it."＝「それを継続することが出来るのは」
② "It would not be possible for me to keep doing it"＝「それを私が続けることは不可能である」
"if I didn't like it."＝「もしそれを好きでなければ。」
ご参考に。
アメリカ合衆国 
