Filing for food stamps

I live with my inlaws, that draw food stamps for me, spouse, and baby, them, and 2 others. I recently found out they're selling them and were about to the end of our rope on food.

I brought this up and it created a war.

Im currently almost 21. I read that you have to be 22 to file for SNAP or not able to prepare meals together. Which (although they never did) i was eligible.

Can you guys lend some advice. What are my opitions for income?