You can create a channel HERE.
The Name you choose for your channel will determine your URL, f you name your channel "MyRumbleChannel" your channel's link will be "Rumble.com/MyRumbleChannel"
The Title is what other users will see in your banner; you can choose "My AWESOME RUMBLE Channel" if you want.
See how it's done: https://rumble.com/vbwn4y-how-to-rumble-creating-a-channel.html