almost universally in the United States, the first clause would be said "If I were to not eat," rather than not to, but it doesn't accept this answer. This should be added to the answers.
kwenda shuleni = go to the/a school kwenda shule = go to school
The former just means the school is your destination. (Maybe you're a postal worker, a teacher or a parent.) The latter means you're a student and you're going to the school to take part in lessons.