At the start, just focus on survival. It's basic Minecraft. Get wood, stone, iron, build a house, and explore the landscapes. If you need some more materials make sure to do "/kit starter". We built a GUI for you if you need some basic information. Use the command "/menu" to access it.
Use the command "/wild" to be sent into the wilderness, or use the portal at spawn. To get to spawn use the command "/spawn". Be careful when you are in the wild as unfriendly players or hostile mobs may attack you.