lets talk about design tools
what a designer needs to make it? sketches are nice if you have a good knowlege of drawing it help alot BUT today if you cant email your work or present it on the computer and quickly make changes in your design acording to the clint needs you can forget about work. and yes like any other service yhe clint is alwayes right even if you donet like the design a real designer adapets his style to the clint needs and style so if you would realy like to see if your up to it take a product and make 2 versions for 2 very difrent companys if u can do that your on the right track