Posted on the r/hacking subreddit, this course is completely free. It's for any level of expertise and covers tools used, how to effectively use them, and has included videos and pdf's.
I just started it as well as threw Kali on my server so I have a full install without any hard drive limitations. I'm glad I have something to do now to stay productive.
https://twitter.com/yesnotmewhy/status/950336961335701506
- yesnotmewhy