.thanks both of you...
I need to ask some more...
Find one's feet
ABC was finally able to find his feet and get a job in a reputable organization. ok
Tip of the iceberg
Iran is facing tough situation these days.It is just like on tip of the iceberg
The situation in Iran is only the tip of the iceberg. The real danger lies across the entire Middle East.
["Tip of the iceberg" = only a very small part of a situation is evident - a great deal more underlies it]
Blow one's top
He is a proud man and always blows his top in front of others. ok; would be better with "often" rather than "always".