Start with /gamemode survival. You spawn on a small raft with a barrel full of supplies. A 100% endless ocean superflat world. Strip apart the raft for materials if you so choose and set off. Mining you will see was a luxury. If you want ores, find them in shipwrecks. If you are lucky, you can use the given endportal frames and go defeat the dragon. The end and nether are normal, but getting there is a challenge in of itself so their luxuries can only be enjoyed with hard work and effort. You start in creative and have cheats enabled if you so choose.