Please, dont give up so easily.I sent an application to an animal sanctuary that was looking for volunteers back in Dec. They acknowledged receipt of it, but have not contacted me about it. Guess they didn't need that much help. And NJ wants a damn permit for everything, even a tree frog for example.
Make an appointment or just go there. Talk to the people who work there.
Maybe your mail has arrived in the spam, or an ignorant volunteer deleted it because he/she was plain stupid.
Get connected through social media or LinkedIn with other animal lovers.