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Ohm's Law.... Voltage = Current * Resistance
Watt's Law.... Wattage = Voltage^2 / Resistance.
The MVP3.0 goes to 30W. On regulated ("computer"-controlled) mods, you typically set either the output voltage or the output wattage, and based on the ohms of the coil, the rest "figures itself out".
Math examples: If you're using a 0.8ohm coil, and you set the MVP for 11W, the device is going to apply just a shade over 2.9V across the coil. Flipping back to the first equation, this means that you're going draw about 3.7A from the battery.
Lower watts (or volts) settings will yield a cooler vape (as long as there's at least enough to fire the coil.) Sometimes using too low of a wattage or voltage will not vaporize the juice, and you may get flooding or gurgling. Too high of watts or volts, and you have the potential of vaporizing juice too fast, and you could damage the wick (which gives you this nasty sensation called a "dry hit") Your goal is to find the spot that works best for YOU. Don't give a rip about how anybody else has their device set - everyone likes something a bit different. Plus, some juices may tend to burn more quickly on the exact same settings, so you have to go with what you're using.
Make sure you "prime" the coil (i.e. let the juice saturate the wick BEFORE you hit it with any significant amount of power.) If I can see the wick tails, I sometimes put a drop or two of juice on them before I install and fill the tank. Then, I let it sit for a few minutes. I might even take a couple of pulls WITHOUT pressing the fire button. Then, starting with a moderately low power, take a couple of fired hits. Then start nudging the power up until I maybe just start to taste a bit of burning. Then BACK OFF

That's YOUR "sweet spot" and where you should vape that tank of juice.
Congrats on getting off the cigarettes..
Cheers!