Obviously, a lot about what you will experience will vary depending on your background, where you are moving from and where you are moving to. I'm a well-off white American living in Spain and I have had a very different experience from a friend who moved from Kenya.
That said, there will be a number of common things.
-
Get used to being confused and uncomfortable. A simple example of this is when you go to a small bank branch here there isn't an obvious queue. There will just be a bunch of people standing around. What you are supposed to do is ask "who is last". Then, once they are done, you know you are next in line. Not a major issue but your will be constantly encountering things like that.
-
Making local friends will usually be hard. Knowing the language will help a lot but, unless you are moving to someplace like Ireland, it will take a lot more effort.
-
Being in a new country won't change who you are. I know someone who moved to Europe planning to travel to a new country every month. But they didn't do that because that's not what they did before moving. So, after a few months, they reverted to not traveling much because that's ultimately what they preferred.
-
Being in a new country will change who you are. Being forced to interact with a new culture will change how you view the world. You will likely learn a lot about yourself that you didn't know, learn how to navigate different cultures better and just understand people better.
Overall, I highly recommend living in a country. If nothing else, it is not boring.
One final piece of advice: if you can, find a local lawyer who speak your language, get their business card (or write down their contact info) and put it in your wallet. Also save it on your phone. If anything happens where you really really need help, being able to contact a lawyer quickly is very helpful.