I recommend you start with an entry-level crop-sensor DSLR, a 50mm or 35mm lens, and a flash or Speedlite.
The only requirement is that you own a DSLR and you know how to change aperture, ISO, and shutter speed.
Yes, with the purchase of digital image files, you will also be provided with images to share online.
Wear whatever makes you look and feel your best!
Portrait session pricing info here