That starting gravity is high nor low until you decide the alcohol content you wish to achieve. Your hydrometer should allow you to infer a potential alcohol content per specific gravity. Some brew stores will give hand out for yeasts outlining the main uses for each, and their approximate alcohol tolerances. Once you decide how strong you wish your beverage to be then you can decide on an original gravity.
From my experiences I would not plan on sweetening your cider to a certain gravity and bank on your yeast "petering out" at a certain ABV, but let the yeast ferment to dryness, back sweeten, then bottle carb or keg, whichever your choosing.