So.... first things first. I would suggest not shooting for the sky to start with. Without a very advanced understanding of mead fermentation it will likely take 2 years plus to get that high alcohol mead drinkable. Also it's not likely you'll get there with bread yeast as most bread yeast will start to die of alcohol poisoning around 12%.
Also, do you own a hydrometer? If you don't then I highly recommend one. I would say it's the most important tool you have in mead making after a bucket or jug to hold the mead.
You say you don't know what specific gravity is and how it relates to potental alcohol, so I will try to explain. Specific Gravity (SG) is a measure the density of a liquid. water is the baseline for this measurement at an SG of 1. As you dissolve honey into that water it gains density, so that if you dissolve 1 lb of honey into a gallon of water the gravity will increase from 1.000 to around 1.035. A hydrometer lets you measure the Specific Gravity.
How this relates to potential ABV is that yeast converts sugar to alcohol, and alcohol is closer to water in density. So if you measure Gravity before you ferment your mead, and then again after, you get a lower reading. the difference in these readings can let you find the ABV of mead, and the last reading will also give you an idea of how sweet your mead is.
So I guess my advice for now would be to re think you goal for this first batch, then let us know what that is, and we can help from there. I hope this was helpful.
I like your name by the way, great song.