Well I'm naive, and tend to believe what people say. So I'll assume that you're a girl, here's some advice. And if it you're not, well... it still can be useful.
Seeing that you're doing research first, and planning it as a business, I think you're already ahead of most of the cam girls.
Most of the cam girls probably are brought into this scene by someone else, like a studio. They'll be told tips, which might help them to start off. But ultimately, I think, you have better chances to make a lot of money in the long run, because you're genuinely interested in doing this, and in doing a good job. I think this, and the "X-factor" are the important things to succeed.
Someone advised to take a look at forums/sites where cam girls discuss stuff among themselves - I think that's a great advice, I was going to give you the same.
One last thing - while many websites ban this kind of thing - to my knowledge, most cam girls are online on multiple websites at the same time. But then again, they often have a partner typing for them as well, to be able to handle all websites at the same time. I don't know the technical details.
Good luck!