What types of projects are suitable for freelancers?

The things they know what to do can only help them to make money and more money. If one don’t know how to the service one’s describing his or her description will be bad (worse than the good or expert freelancers). So start learning and getting experience before you start searching for clients. You can only win more money if you know good how to do your job (not your official job but freelancing) and how to present it to the public.