If you're new to cybersecurity, a great place to start is ISC2 Certified in Cybersecurity (CC) training. However, before diving into the CC, it's important understand in basic IT infrastructure skills such as networking, operating systems, and servers.
There are plenty of free resources available on YouTube to help you get started with these fundamental topics. Once you're comfortable with the basics, you can move on to professional training for the ISC2 CC certification.
Regardless of the path you choose, real-time working experience makes you true expertise in the cybersecurity field.