Do you have a Bible? The Catholic Answers Bible would be good for you. Start reading the Gospels: Matthew, Mark, Luke, and John. Your church’s RCIA classes might be on a summer break depending on where you are, so inquire at your church. Reading the Bible, the Catechism, and some good books would be a good place to start. Are you able to pick up any other books, like Patrick Madrid’s Why Be Catholic or Trent Horn’s Why We’re Catholic? Also look around the Catholic Answers main site for informative articles.
ETA: Catholicism For Dummies is also good for beginners; don’t be off-put by the title…it’s a whole series of informative books.