a community of practitioners
First congratulations on your graduation.
Just a quick disclaimer: I would encourage new grads to find somewhere first to get experience (and a clientele!) before you try to add running a full business on top of entering a new profession. You can do this as a sole proprietor as an independent contractor or as an employee.
For running a business, the sole prop. is the easiest way to go - if you keep it small and tight I would recommend this. When (if) you are ready to expand you will probably want to switch to an LLC.