Here are 17 platforms where you can begin learning cybersecurity:

    1. HackXpert - Free labs and training.
    2. TryHackMe - Hands-on exercises and labs.
    3. CyberSecLabs - High quality training labs.
    4. Cybrary - Videos, labs, and practice exams.
    5. LetsDefend - Blue team training platform.
    6. Root Me - Over 400 cybersecurity challenges.
    7. RangeForce - Interactive and hands-on platform.
    8. Certified Secure - Loads of different challenges.
    9. Vuln Machines - Real world scenarios to practice.
    10. Try2Hack - Play a game based on the real attacks.
    11. TCM Security - Entry level courses for cybersecurity.
    12. EchoCTF - Train your offensive and defensive skills.
    13. Hack The Box - Online cybersecurity training platform.
    14. Vuln Hub - Material for practical hands-on experience.
    15. OverTheWire - Learn security concepts through challenges.
    16. PentesterLab - Learn web-application penetration testing.
    17. PortSwigger Web Security Academy - Extensive learning material.


Some may be freemium, if you have any other platforms to add then let me know