In the lobby you will see a large number above where you enter (this can be used for people to find your lobby easier)
There are also lots of potted plants to keep everyone alive.
There will be the shops where you can buy items for your adventures, but those will also look a bit different. They are basically embedded in the wall.
On the far side of the room you will see the ship. You can get on and take it to any planet or area you want (I will name the planets/areas in the comments.
You can also take the return tube which will take you back to the main area.