I'm not massive but I've thought about it. It's an investment, just like any venture where you're selling your own product or services. If work for yourself (as you should, a lot of porn companies take advantage of their performers, at least before they get big), you need to procure your own camera equipment and/or hire someone to do it (though it isn't impossible to just use an iphone and a tripod), get in touch with ppl willing to perform with you, build a social media presence, and a heap of other stuff.
Luckily enough, it isn't as heard to break into the industry as it was years ago since everyone has a decent camera in their pockets now. You just need the marketable skills required to get others on board with you. Once you have thaf, you're golden