Don't worry! There's no such thing as over-punctuating. Punctuation marks provide a road map for the reader. Put them where they belong. Don't put it where they don't belong. Don't worry about how many or how few punctuation marks you have.
In American English, plural pronouns may not represent singular nouns. A child is not they. A child is he, she, him, her, he and she, he or she, him and her, or him or her. Because you used plural pronouns throughout, I pluralized child.
Student or Learner