Some of your prior posts refer to you having a therapist. If you are still with a therapist, can you contact them and let them know you are homeless and need resources? Either that or if you say where you are we can find a shelter for you.

Joining or starting a band and living in a studio isn't really an immediate thing you can do. You need to be in a shelter at the very least and at a shelter there will be services to sign you up for food stamps and other assistance. I believe you are in the United States?