Here are some websites to learn ethical hacking and cyber security .for some sites I mentioned below, you must be familiar with programming language because they are to test your hacking skills so I will recommend to have knowledge on at least one programming language first.
1.https://www.cybrary.it
This website provides training for most complicated topics in IT sector. It is supported by a community of people to provide up-to-date lessons and learning materials. It also provides the chance to connect with businesses in IT sector industry.
2.https://www.offensive-security.com
This is the most recommended website to learn ethical hacking. It provides various online courses, live courses and in house training programs. You can become a certified ethical hacker(CEH) by participating in their certification exams such as OSCP, OSWP, OSCE, and OSEE. It also provides services as security training and certification, penetration testing virtual labs, penetrating testing solutions, community projects, etc.
3.https://www.eccouncil.org
This website offers numerous certifications in a variety of fields related to IT security. It provides all kinds of courses and tools that makes you a CEH.some certifications provided by ec-council are CEH, certified computer investigator(CCI), computer hacking forensic investigator(CHFI), certified security analyst(CSA), network security administrator(NSA), licensed penetration tester(LPT), etc.
4.https://hackaday.com/?gclid=CjwKCAjw-YT1BRAFEiwAd2WRtqaSIaYqMckjrULfMYhnsWKUYAOgwPrv6NrpK1qxyqg1-t_qj-bf5RoCygkQAvD_BwE
It is a blog which publishes daily articles about hardware and software hacking. It also has a YT channel where it posts projects and how- to videos.They provides mixed content like hardware hacking, signals, networking and cryptography. It also features several projects and competitions.
5.http://www.securitytube.net
This website is branded as YouTube for ethical hacking and information security. It features many important security courses containing everything from basic to advance. This website is a collection of many courses created by experienced security researchers.
6.https://www.hacking-tutorial.com
It is a collection of hundreds of tutorials on ethical hacking and cyber security. It provides latest hacking news, tools and ebooks. You can also learn various attacks and about programming related hacking tasks like how to make a python host, code your first SQL injection, etc.
7.https://blog.rapid7.com/tag/metasploit/
It is a popular blog among ethical hackers. They provide tutorials, news and information about world’s popular penetration testing software ‘metasploit’.
Other websites:
1.https://www.root-me.org/?lang=en
2.https://uiz.io/EXUC
3.https://www.stationx.net
4.https://www.hackthebox.eu
5.https://www.hackerone.com
6.https://uiz.io/XrfxdB
ENJOY LEARNING 
!