The federal government is delivering vaccine shipments in bulk to states, which are then responsible for distributing the doses to different vaccination sites, such as pharmacies and clinics. Therefore, the vaccine is available in different places in different states. Depending on your state, you may be able to get the vaccine at a healthcare site (like a doctor's office, pharmacy, hospital) or a temporary clinic set up in a school gymnasium, community center, church, or library.
Most states have websites that outline in detail who can currently receive a Covid-19 vaccine in that state, and where they can get it. People are encouraged to go to their state or county website as many have a feature where you can enter your information and receive updates when your group is eligible for a vaccine.