change my life (Tokyo)

Hello everyone, I suppose it is not easy to go in a new country without knowing the language and have no contacts ,I already had experience of changing the country for 2 times (greece and italy) lets say that in both cases I started from zero but I'm not afraid, I think having not the language skills and not knowing anyone.
I'm thinking before before making a choice.
However I would like some advice or your own experiences
I think that could maybe help me understand how it works, how to find a job, how to learn the language or if there are other courses and you may encounter difficulty setting etc.