When you first spawn into Decentraland, you will be brought to Genesis Plaza where you will find current and upcoming events as well as popular areas that other users are at. You can also press X on your keyboard to explore Decentraland’s highlights, places and events.
Familiarise yourself with moving your avatar around:
arrows or W-A-S-D keys.V to switch between first and third-person views.B to bring up a selection of emotes that your avatar can do. You can also customise the wheel of emotes that show up by pressing B → E
To understand the keyboard shortcuts and commands in Decentraland, head over to Important Keyboard Shortcuts