You have to produce one just to get into college if that's where you see yourself. If not get digital with all of the software tutorials on YouTube starting with Adobe Photoshop and then branching out from there. Best advice i ever got when deciding if I was to go digital came from a friend's wife who was already working within a Mac. She said " Even if you stay with just pencil and paper it all gets digitized anyway so might as well get wit the program and learn computerized illustration". The rest is up to you.