step 1:
Play as many CTFs as you can: CTFtime
Linux, Crypto, and more: OverTheWire Wargames
PowerShell Training: Under the Wire
Network Simulator Game: CS4G Netsim
step 2: Rooms and pwning boxes
Play as many rooms as you can: TryHackMe
After TryHackMe, try Root Me
After Room Me, try Hack The Box