If you accomplished little, you probably have a sense of depression or even desperation stealing over you.
The bad news is you can't undo the last 6 months so just get over it. Put it behind you. Make a plan for the rest of the year.
The good news is that you do have another 6 months to make your mark, to accomplish something great--something that only YOU can do. So lay the foundation then build that something 1 brick at a time.
Success is achieved in dribs and drabs--1 small action at a time.