@Troyk88, two things: First, you won't necessarily have to seek out 100%VG juice to address your itchy mouth/throat problem (if, that is, it turns out that PG is causing it). I suffer from something similar from PG, and 65VG/35PG e liquid takes care of it.
Second, when you inhale, be sure to breathe in slowly and steadily, rather than taking a quick, sharp puff, as you would with a cigarette. That might help with the coughing. And, if push comes to shove, you don't even need to inhale to get the nicotine, as
@r77r7r already mentioned.
Welcome and good luck!