I have the same situation with you.I am a greenhand also.And i worked in our factory for about five months.Yesterday, I just sent the samples for the first time after i strived for a long time.
And i think you really shouldn't vexation,just as the old saying goes"The Rome is not built in one day". Persist in doing it is very important.And the job is not easy,maybe you will encounter many problems during the process,I think.
Never say die,you will success one day.
Good luck!