You should buy a real hydrometer. You don't have any actual readings with your home made one, and who knows if its accurate or not. Did your wine go through fermentation? if so, then yes there's alcohol in it. How much? Who knows. Without an accurate reading of your initial gravity to compare to your final gravity, the only thing you can do is make ann educated guess (by looking at your recipe and plugging in numbers) as to what your initial gravity was.
Edit to add stuff: A hydrometer in plain water will read 1.000 at the correct reading temperature. Anything added to the water will raise the gravity reading, which causes the hydrometer to float higher. When it ferments, the gravity will decrease to a level closer to the gravity of plain water. It may ferment to 1.020 so the hydrometer will float higher than plain water, or it ferment lower to 0.990 so it will float lower than the level of plain water. Temperature differences will cause slight differences in the readings, but without actual numbers in the first place.....
"Stop giving me credit for those stupid quotes! For that last time it wasn't me! STFU NOOB!" <-- Benjamin Franklin
Reason: adding stuff