You should definitely keep looking for another job while working as a volunteer there. As your skills enhanced and time last, you will find a job for sure. But before anybody hires you, they will ask you to provide a reference. You need a strong recommendation from current company to help you. He doesn't have to be a boss. A colleague will do as along as he knows what you can do and have good impression on your personality. You need at least A good friend there. Work hard and try to be socialized with people around you. Look luck.