I agree with Algore on starting out behind the camera, but I'll go him one further.
Video technology today is easier than it's ever been. Hell, people are becoming famous for shooting stuff on iPhones.
I say borrow or rent a decent camera, take some time to learn what you can do with it, persuade some of your hot friends to "act" for you and go for it.
Write a script that won't be too challenging technically, i.e. mostly daylight scenes. Rehearse! It's amazing how many blown lines are included in even the best rape porn.
Shoot cutaways to set the scene, convey movement between sites, show actors pondering their next move, etc. Heavy boots creeping slowly up the stairs of the young maiden's apartment, his hand on the doorknob, her concerned look in the mirror as she stops brushing her hair thinking she heard something: that sort of stuff.
The beauty of shooting video is the instant playback. You know exactly what you've got and if you need to reshoot it either for better quality or a different take on the action. The most difficult thing -- and this is also borne out in commercial rape porn -- is good audio. You really need a boom mic and someone who knows how to get the levels right between environmental sound, talking, screaming and dirty threats whispered in a pretty woman's ear.
Start with a simple scene. Practice some pans, zooms and dolly shots. Sit in the back of a moving pickup truck and shoot someone running along the sidewalk. Then get out, stand on the sidewalk and have him run right past you. Cut these shots together and see how "professional" it looks. As you progress, you'll find yourself needing a video editing deck, but starting out you can shoot things in sequence if you keep it simple.
Keep in mind that Ben Affleck and Matt Damon wrote, acted and produced "Good Will Hunting" right out of the box. Be inspired to follow them.
You CAN become a force in the porn industry without spreading your sexy legs. Unless, of course, you feel compelled to thank me for this valuable encouragement.
