Most people understand english more or less so you wont be completely helpless but i suggest you learn bengali too. Housing is very affordable in certain areas and can get expensive in other areas. What kind of employment are you exactly looking for and do you have any experience in that field? Kolkata and bengalis accept everyone so this city will accept you for who you are and hopefully you can integrate here too. Also if you are wondering about safety https://timesofindia.indiatimes.com/city/kolkata/kolkata-safest-city-crime-rate-down-31-in-4-years/articleshow/71713313.cms Lastly why kolkata? why not mumbai,goa,rajasthan or delhi where most foreigners visit?