Ending college is a happy and sad feeling at the same time . Happy because ofcourse there is a feather in your cap.Sad because you won't be allowed to live a carefree life like before and will be missing everyone that has been a part of that journey .Been an year since graduation I still want to go back and relive those days .
All the best to your sister , and wish her all success .
My advice to her don't feel so intimidated to chose up a job offer till she is 101% satisfied . And ofcourse give learning preference more than the money at this stage. After college I was stuck at a high paying job just cause of lucrative salary they gave but ended up hating my life and then had to quit it .