Newby myself, but I would suggest that you reduce the nicotine level (unless you were a very heavy smoker). I've been using 18mg (smoked between 2/3 and a pack a day) and generally enjoying the throat hit, although at times it's been a bit harsh and led to some mild coughing. I've also tried 16mg and 12mg, which was definitely smoother. Just got some all-VG juice to compare, with some trial and error you will find your perfect levels.
Try something like 70PG-30VG at 16-18mg if you want more flavour and like some throat hit, you can also try 12mg as well to reduce it further, or go with a higher VG % if you want more vapour, subtler flavour with a lesser throat hit.