The Affordable Care Act, known as Obamacare, has created the option for individuals such as yourself to access affordable health insurance. Since you have little or no income, you should be able to receive a substantial premium credit to reduce your monthly costs. You can sign up through the Health Insurance Exchange in your state, if it is functioning, or through an agent authorized to act on behalf of the Health Insurance Exchange companies.
If you Google "Health Insurance Exchange" followed by the name of your state, you should be able to get the information needed to get yourself signed up. Since open enrollment ends in March, you want to get going on this. My understanding is that for coverage to begin April 1, you need to get signed up by March 15th.