Account Migration has not begun. There will be an in game message when it's your turn to move. Do not fall for any third party websites that are telling you to migrate NOW. They're trying to steal your information.

hi I have a problem with Minecraft on the Nintendo switch, I was playing with a friend of mine when at a certain point he disconnects me from the world, then I tried to re-enter and when it loads it freezes the screen behind and tells me: unable to connect to the world. Why?