As long-term expats ourselves (25+ years already) we have plenty of experience of what foreigners want to know when it comes to settling down in Sofia and we share our knowledge on these pages and in our annual print guide with a wealth of tips and survival advice from other expats. There are of course also several facebook groups focused on Living in Bulgaria( a good one)  - others can be more childish in nature as the profile of the expat also changes, and of course you will receive plenty of comments on any question you ask (sadly not always nice comments either)