I am trying to learn unity and am trying to go into multiplayer games however UNet is no longer available and most resoures on yotube or udemy use Unet.
The Unet HLAPI has been removed from the engine and moved to a package. I don’t believe it will be supported at all in Unity 2020.x. If you want to follow Unet information I’d recommend you go with Mirror instead, as its high level interface is based on the Unet code base.
But if you’re trying to learn Unity, jumping into multiplayer and a deprecated API is a terrible idea.