if you wan to be a graphic desgner you must first know how to draw. of course

but it depends on the type of career track you planning to be in.

such as a cartoonist

A 3d designer.

A cartoon maker an more.

You have to get your masters degree and maybe a few others.

and your salary can be as musch as $45- 80,000 a year maybe.

Like i said it all depends on what career path your going into.