Hi, im traveling to Japan alone march 1., and having read alot online I still have a few questions

how well do japanese people understand english?

I get the impression that many japanese people dont talk to strangers. how easy is it to get to know people? are they reluctant to get to know scandinavian people.

budget wise; how much per night for a 3 star hotel in a city like Osaka, Tokyo etc?

Will it be easy to get around on the metro even if you cant understand any japanese?

im gratefull for any answer