Transferring the world to single player

I downloaded the latest version of my world from realms because I want to play in it single player as my friend no longer plays and I want to save money. However, when I transfer the world, I spawn in without any of my items and I'm suffocating in the wall. I have opened the world to LAN so I can access cheats and the world has fully loaded, it is just the player data which didn't transfer. I have tried downloading it multiple times and it still has the same issue.