The degree is a significant accomplishment, but in a competitive market, experience is hard to beat.
Your volunteering with a healthcare related organization is certainly a good first step. Take a look at any other work experience and try to determine if there are any skills transferable to a healthcare environment.
In addition to checking with your school for additional resources and help, be sure to connect with your local ACHE Chapter as they should be a good source for networking.
Take advantage of the Career Resources offered by ACHE including those designed for Early Careerists and specifically the Career Management Network.
Be sure to be clear when networking on what functional areas you are targeting. It may be that you will need to be flexible with the entry point (in role and setting) as you begin your career.