Congrats and KEEP IT UP!
I was 2 packs a day of Camel Blues, heard they were 1.2mg.
I currently use (on an average day) around 2mL of 2.4%, of my self-imposed 4mL/day juice budget.
I could easily do more juice and have done about 10mL in a day (MEL Blue Voodoo), but then again... I could have smoked more than 2 packs in a day as well if I had wanted to and did anyhow whenever I skipped sleeping.
I'm thinking your goals are probably like mine: get the NIC, don't smoke, don't freak out, enjoy yourself.
If so, don't sweat the volume. From what I have read, observed and experienced... if you need the NIC, you will vape until you get enough... if you need the act of vaping/smoking, you will vape until you get enough. The brain seems to lean toward lighter hits when it doesn't need more NIC similar to if you ever put a stinkie out early because you stopped craving it before you finished burning it.
*** I always presume others are somewhat like me. I also always presume they are healthy and fit enough for whatever I may suggest or incite.