First of all, the main reason to learn how to become a pornstar is so that you can get yourself in front of a lot of eyeballs and make a name for yourself in the broader adult entertainment world. Money is actually NOT the reason to do this, because porn shoots pay only about $1,000 for new girls. I mean, I assume it's possible to make a good bit of money if you go out to Los Angeles and shoot a whole bunch of videos in like a week, but it would pretty much be a one-time gig. It's not something you can live on, like you can with a camming income.
So, basically, you need to use becoming a porn star for the promo burst. Once you get well known, your camming income will skyrocket because there's nothing more in-demand in the webcam modeling world than a pornstar. Viewers love the idea of getting intimate with a hot famous girl, so they'll pay a premium for it. You'll sell a lot more videos, too, so you'll need to be sure you've got plenty of those available for purchase through sites like ManyVids before your porn scenes debut.
Selecting a porn producer to do scenes for is pretty much easy, just select a good agency with a reputable track record. I would recommend LA Direct Models and Matrix Models. They'll both get you lots of scenes, and you'll most likely be able to do them all in the space of a week. They'll fly you out to LA or Las Vegas, put you up in a hotel, and tell you exactly where you need to show up for shoots. It's cool and fun, as long as you select an agency known for treating models right.
If porn work appeals to you, this is definitely a great way to boost your camming career. As a pornstar, you'll get a LOT of attention and buildup a base of devoted fans who will buy your content and patronize your cam on the regular. It makes sense for those so inclined!