A couple of obstacles could include things such as
Before:
- having to find the means to immigrate, so money, a way of travel, a way to bring their belongings etc
- safety. some people trying to immigrate have to make sure they're safe to leave before they can due to some circumstances in certain countries
Upon Arrival-
- finding steady work
- the language barrier
- being able to get basic necessities to live (a place to live, clothes, food, etc)
After immigration-
- facing discrimination/racism
- dealing with being separated from family in their native countries
