Help with starting my car

Make sure the battery is fully charged first and check it is still a good battery . Make sure you have a good connection at the battery terminals. Remove clean + - connections reinstall them. Make sure you have a good ground from the battery to the engine block . This is usually the ground for the starter. Remove clean and reinstall at this connection. If everything checks out fine but the battery keeps going dead you may need to check for a short in the system or parasitic draw causing the battery to drain down when the vehicle is not being used.

Remove the battery have it charged and check all cells are good .