Whatever the case, you'll have to stream yourself through a web cam portal, one of the massive sites that catalogues thousands of models and acts as a go-between between customer and model.
If you've looked at porn online (which we pretty much all have), you've likely been propositioned by advertisements for cam girl networks.
And when that time comes, you'll have thousands upon thousands of girls ready to swivel and smile for you in real time.
It's a massive catalogue of preening women of every variety: big, skeletal, black, white, Asian, American, Greek, Czech, etc.
They all offer more or less the same "service:" You supply the body, the network supplies the eyeballs -- and takes a cut of what your viewers pay.
Each network will ask you to fill out a brief bit of biographical information -- list your interests, and try to sound fun -- and then check a box or pull down a menu saying that you're 18 or above.