In Spain people with foreign money usually have no problem for integrating to society. The level of english is one of the worst of Europe, nobody of your age will know any word of englsih and young people will be able to speak some. You will not be able to pay anything directly with bitcóines, only there is la calle bitcoin in Madrid but there are some cajeros bitcoin (arround 7000) https://www.groupbtc.com/es/cajeros. Considerate Catalonia, I'm from there and is a good place to live.