introduction to Ethical Hacking [closed]

Context:

Last few years, I've been interested in computer science, developing languages etc.. After getting more knowledge on it, I got introduced to ethical hacking, and I liked it.

Main Problem:

After trying several ways to learn ethical hacking (free courses, PDF files online etc..) I still can't get any knowledge on ethical hacking. I know that results won't show in the first years, but I had the feeling of not learning things. So I came here looking for professionals to redirect me to good courses, and maybe give me some tips.

Thanks.