If it's tasting burnt then either your over powering the coil in the tank or the coil is shot. If you did over power the coil to get the burnt taste, well the coil is shot (the taste will never go away due to the burnt cotton or other wicking material).
You got a nice little mod there and is certainly a step up from the gas station vape pen you have. I suggest a different tank with coils that can work within the new power range (or higher). The Nautilus Mini is nice, will work within the specs of your new mod, and the coils are inexpensive and available.
BTW....as to your juice and the soapy taste issue, I have that with a Watermelon Kiwi blend when drinking Bud Light. It's almost as if I can feel the bubbles. If I switch beers or juice the taste goes away. But I like this juice and I don't drink Bud Light often so the choice was obvious
And congrats on quitting the stinkies!!