Originally Posted by StefanG

sounds weird but true - a good smartphone and a gimbal (stabilizing for video) would be nowadays enough to start if you go for amateur style.

For pictures at some point you will want to use a real camera with optical zoom cause the digital zoom in phones usually sucks.

add in two LED video lights and you're good to go

also forget about opening a site, go to all the platforms out there like manyvids, clips4sale, Pornhub Premium, xHamster Premium etc and build chanels/followers there.