Sometimes you need to get creative, and make your own job.
About 20 years ago, our elementary school(private, parochial) didn't have a latchkey program, and I heard a number of mothers expressing a need. After doing some research on what was involved, I talked to the pastor, and set up a program.

Summer is coming, how about offering yourself out for childcare, maybe 2 or 3 girls with an interest in AG?
How about offering tutoring during the summer?
My neighbor girl practically put herself through college working as a nanny during the summer. A lot of parents prefer one on one to daycare, and are willing to pay more.
Keep sending resumes, and try not to get discouraged. Sometimes a defeatist attitude carries into an interview.
Look for other places, beside the library where you can volunteer. Sometimes volunteer positions become paid positions.
Just do your best, not to let it get you down!
I've been through a couple of bouts of unemployment with my husband, and he did the best when he was kept busy. He's an accountant, and for him, there were always accounting temp agencys, so he could keep working in between jobs.
That did a lot for his morale!
We'll be rooting for you!