Until now you have the baisc Fundamentals about netowrk , AD and linux
so let's start get our hand a little dirty
learn About Security Fundamentals
you need to start understand what is the mean of cyber security , what is the mean of something like hashes , cryptography and other
Sans SEC301: Introduction to Cyber Security
so if it's the same of the concebt about security inrto why i should study this course or why i didn't start with it , sans course are more deep than the course that i mention it before , it's a littile deep and maybe more complex so i prefer if you want to study this course to take on of the course i mentioned it , so you have a good back ground before get more deep with sans
SEC401: Security Essentials - Network, Endpoint, and Cloud
his course will teach you the most effective steps to prevent attacks and detect adversaries with actionable techniques that can be used as soon as you get back to work. You will learn tips and tricks designed to help you win the battle against the wide range of cyber adversaries that want to harm your environment
i prefer not to study the 4 , 5 , 6 books of this course at this moment , if you want to know about cloud you can look at az-900 from microsoft
You have many way's to learn
Security + course
Mostafa Yehia intro to cyber security course
THM pre security course
that's some of great free course you can look at it