Get help with paying bills or free stuff.

I am a current green card holder but not yet a U.S citizen, wanting to relocate and live in in the United States, Miami specifically. I am planning to pursue a bachelor's degree. I am eligible for Student aid to help me pay for the cost of school, a major concern I have is living arrangements, as I will be making the move alone and no family in the state.
Is there any kind of assistance that would be available to me, for finding a place to live, rent subsidy etc..., I would greatly appreciate feedback on this matter, thanks.

One nationwide program for both immigrants and refugees is run by Catholic Charities. They help newcomers to the US. The staff there may be able to place you into transitional housing and help you apply for student loans and other support. Find details on Catholic Charity programs for immigrants.