Starting the Game (Minecraft)[]
Very little is changed in the actual process needed to launch minecraft.exe, although you can use a pre-made world, you can't get raw cruxite without hacking it in, as it won't spawn as an ore underground.
All things considered, though, you'll probably want to make a new world.
Starting the Game (Sburb)[]
In order to begin playing Sburb (in Minecraft), you will need to collect both Iron, Uranium, and Cruxite. They are all crucial in constructing the equipment needed for Sburb - more specifically, to make a Computer and both Sburb Disks.
After you have at least the Computer and one of the necessary Disks, place the Computer somewhere near the middle of your house and insert all your disks. Inserting a Server Disk will let you connect to any computer containing a Client Disk, including the very computer you are using!
Once you have a functioning client enter edit mode so you can deploy the equipment, you need to open your Inventory (e key), or your Sylladex (g key) and put the items in your hot-bar; alternatively, you can Pick Block (middle mouse button) on existing versions of blocks. To begin the process of entering the medium you need to deploy a Cruxtruder, Totem Lathe, Pre-Punched Card, and Alchemiter for Alchemy.
For more detailed and up-to-date information, see Getting Started.