I moved from the UK to the Isle Of Man in 2006 without knowing anyone. I moved over with my wife and it's obviously an english speaking country, so a slighty different scenario.
However my wife initially didn't get comfy with the move and wanted to go back after 12 months.
I on the other hand was loving it and fitted in straight away.
I think that there were 2 reasons for this….
1) My wife was very very close to her family, so she missed them lots.
2) I was keen on cycling and motorbikes, so met loads of people through my hobbies.
All of our friends have been met through cycling, motorbikes or work.
My best advice to you is, where ever you move to; embrace their culture and way of life. Get involved with as many local activites as possible, no matter if it's the local pub quiz or a cycling club 🙂