Not sure what you’re looking to get into specifically but here’s some resources you can look at in no particular order:

Hack the Box Try Hack Me Pentester Lab Hacker101 Portswigger Web Security Academy Linux Academy Bugcrowd University Hacksplaining Cybrary Malware Unicorn bugbountyguide.com CTFtime root-me.org MalwareTech Nahamsec The Cyber Mentor