Maybe the first thing a beginner should do is to hit the ball dead center and learn where it naturally rolls. But you won't have too much control on the shape you get without adding top and bottom. For that you have to have chalk.
I learned on a crappy old 10 footer than must have been donated to my dorm by a room that went to smaller tables. It was a beast, but the worst part? No chalk. The tips were glazed like glass and you absolutely HAD to hit the ball dead center and let it roll to position. Even stop shots were impossible unless they were real close, and on a 10' table, they rarely are. To this day it's really the only sure way I can get position for the next shot, so consider good chalk as a valuable learning tool if nothing else.