Professionals want their work to be seen and are constantly sharing their favorite images.
Another option is to attend a wedding photography workshop where live models are brought in (often in wedding gowns) for you to practice your techniques on.
To do this, there is a mind boggling array of options, from completely free to fully custom designed sites.
You can find pre-made website templates for photographers that require little changing for about at Template Monster.
Scour both web and print sources and learn from the best.
In analog style, I recommend starting a physical scrapbook of images you like.
Other popular online galleries include Zenfolio, Pbase or even Apple’s i Web.