There are several places where to begin to learn IT security, you can search all over the place on internet and find interesting resources, however you will notice that there are so many resources and these resources go deep or very superficial, this create some kind of frustration of where to begin to learn or the path to take. This frustration push the tech to abandon the security arena.
The best way is to select entry level certifications, this will give you the path the base to build your security knowledge.
CompTIA Security+ is a good place to begin, it cover a lot of information, however it give you a good foundation and from there you can build your knowledge.
Sure, there are other entry lever security certifications, just select one to begin your security journey.