When something is hard,= difficult, I try to get= stay  motivated by eating some sweets.
Even when I am fully concentrated, I sometimes get distracted when I study a lot.
So I try to eat delicious chocolates or sweets to stay motivated.= keep myself motivated.

Evaluation: You expressed your ideas honestly and with good meaning. A few words and sentence structures need improvement for better flow. However, you are doing well and showing steady progress. Keep it up!