Commencement is an another word for graduation which refers to a ceremony someone would be bound to attend after he or she finishes their entire school work(or after they did a certain required amount of work as to do so) before going out into the society(or move ahead in order to recieve more advanced education)
"Man....never thought I can get this far...
I mean, it's hard to believe....
that my school life is...finally OVER."
"Need not to worry about it for now, as the word tells,
' might indicate the end of your school life
but it also contains the definition of 'the beginning'.
It's too soon to say that it's over,