I suppose its all trial and error at first between actually finding what you like, the right blend, voltage, flavor shots etc... Im guessing after a month or so I'll hopefully have it down and actually know what Im doing, lol
I went to a brick and mortar store when I first started. I did pay more, but I was able to ask a lot of questions.... Of course, I didn't know anything about ratios, flavor shots, voltages, etc at the time. But, I did get to try the stuff! I ended up with an ego 3.7 volt kit. I find that if you stick to low res stuff, 3.7 volts works well.....
I have since also found that I like vg better than pg as pg can give me a sore throat.... I guess it will give you more of a throat hit, but to me it feels like post nasal drip, so I really don't like it. You might also want to get some different strength juices, too. I used to smoke more than a pack a day of full flavor, but I started and usually use 18 mg. 24 will give me more satisfaction, though.... On the other hand, if I find myself chain vaping at night, I find that it can keep you awake as the nicotine is a stimulant.....
I have never added flavor shots. A lot of vendors will have their own blends and know how much flavor to add. You could end up with too much flavor if you get added shots.... At first, your taste buds might need it.... Different flavors and vendors have different strengths of flavors. Some flavors are stronger than others....
I hope I haven't confused you further......