These are my personal opinions based on my background and training experience.
To quote directly from their site:
Want to learn how to hack things without breaking the bank? We've got you covered.
They have several training classes listed on their website:
* Practical Ethical Hacking - The Complete Course
* Windows Privilege Escalation for Beginners
* Linux Privilege Escalation for Beginners)
Visit their main page at https://academy.tcm-sec.com/ for more information, or go stright to their training page at https://academy.tcm-sec.com/courses.