My dietary plans aren't going as planned. I find myself not being able to resist eating sweets.
I've been trying to improve my eating habits, but it's not quite successful.
ご質問ありがとうございます。
① "My dietary plans aren't going as planned."＝「私の食生活は計画通りに進んでいない。」
"I find myself not being able to resist eating sweets."＝「甘いものを食べることを抵抗できない私がいる。」
② "I've been trying to improve my eating habits,"＝「食習慣を良くしようと努力している」
"but it's not quite successful."＝「でもあまり成功していない。」
ご参考に。
アメリカ合衆国 
