Here are the reasons why:
1.) You admit that you haven't actually cammed before (
"Recently I've been considering starting up as a Cam Guy on Chaturabate!"), which means that you know nothing about the business, how to act on cam, what the repercussions could be, etc. That means you might let a real name slip, or give away location accidentally, or do any number of things that could be potentially dangerous on cam. You also don't have an established fanbase, which means that you won't be bringing any traffic of your own to the table, leaving it up to the girl to bring the traffic.
2.) Most girls who cam with/make videos with guys are camming with their boyfriend/husband/partner, NOT a random guy who just randomly wants to have sex on camera for money. Even pornstars don't do that, they generally work within a pool of people who are already within the industry. If girls wanted to work with randoms, you'd see camgirls posting on ACF looking for male partners. If that's ever happened, I've never seen it; they generally are looking for other camgirls who are *established* and will bring their own traffic and fans to the table.
3.) You make no mention of having a clean STD test, or requiring that your partner also be able to prove they are STD free. That is a HUGE red flag which shows that you really haven't thought this through/aren't completely committed to both your own health and your partner's.
4.) You seem to think that you'll make more money with a partner - That's not necessarily true. This shows that you haven't watched enough male models/talked to them/done research into camming alone as a male. Guys can pull in very good money solo, and sometimes even make more than a couple. So it sounds like you're just looking to get some quick pussy under the guise of camming/making money.
5.) A few questions that don't need their own bullet point: Can you get it up on a moment's notice? What if it's a fetish that you're not into, can you keep your boner? Is your dick actually *nice* to look at?
(No, we don't want to see pics, please don't post them!) Is it on the larger side/are you hung? Do you feel comfortable having sex for money? Are you in shape/attractive? Can you handle your dick and face being recorded and put on the internet for eternity? Could you handle it if your family found out? Do you know anything about the behind-the-scenes of the business?
tl;dr - Any girl in her right mind won't touch you with a 100-foot pole. Just no.