My son previously played minecraft on PC with the bedrock edition. He now has a Nintendo Switch and is playing on that.
I have created both a Nintendo Account and a Microsoft Account for him, as instructed, and signed up for the Nintendo Family plan. This means he is able to join selected servers and realms.
Now I want to upload the previous world he created on PC to realms, however I am at a complete loss on how to do this?
Does he need a mojang account, besides the Nintendo and Microsoft account? If so, how do I create it such that it is linked to his existing accounts?