"CyberStart America" has a self-guided set of fun cybersecurity challenges aimed cybersecurity student beginners. The best part of their content are their videos in which techniques are explained. There is zero fee to join if you are a student.
https://www.cyberstartamerica.org/
https://play.cyberstart.com
https://www.cyberstartamerica.org/
https://play.cyberstart.com