So far, everything seems to be fine. The others have posted good advise on the VTC and the Uwell crown... neither of which I have. I can give you some overall advice.
First, everyone's vaping preferences are different. what works for me may not work for you. Currently, I am rocking a 3.2 ohm coil, 12 watts on an old Nemesis with a kick. That is gear that is way outdated, but I am having fun with it. I do have bigger, badder gear, but for now, this is fun, so this is what I'm vaping, and that's the important part.
As far as how the shop is treating you, give them some feedback. Chances are, they've been vaping for quite a while. They've talked to so many people, and if you don't hang out at the vape shop all the time, you might be treated like a new person (I hate the word noob). After walking through the last 5 people, teaching them what vaping is and what it's about, then you walk up, and they're in the "new folk" mode. It's not you, it's just how the industry is. Also, use of the "lingo" might help them adjust to your skill.
As far as the nickel wire.... You'll hear a bad rap about almost any temperature wire... Nickel, Stainless Steel, or Titanium, they all have their ups and downs. But the truth is, none of it is substantiated and is theoretical. Titanium wire, for example, can produce Titanium Dioxide. They have found an increased risk of cancer in lab rats in one study, so it is viewed as a "possible" carcinogen. However, we use Titanium dioxide every day in gums, powdered doughnuts, and many other consumed products, and to date, no links of cancer have been made, even to those who are around it during packaging, etc... However, the words "possible carcinogen" have been said, so it has a bad rap. When it comes to Nickel, one guy produced a video, and sounds very valid in some points... However, to produce the dangerous chemical he's talking about, you would have to reach 1,500 degrees. That is way hotter than anyone would vape. And anyone who even attempts to vape something at that high of a temperature would get a mouth full of burned cotton and juice. His beef seems to be with temperature control as a whole. I personally wouldn't worry about it, but that's me. You can find bad studies and opinions on just about anything. But when they start banning dihydrogen monoxide (
DHMO), I'll be the first to raise a glass, and drink some pure DHMO in protest.
Now, as far as your vapor preference, if you like a lot of vapor, but less heat, perhaps you should look into a device that has multiple higher ohm coils. Usually for one or two coil devices, the ohms rating tends to be fairly low. for my experience, I prefer two 1.4 ohm coils in my devices which come down to a .7 ohm setup. Not cloud chasing stats, but it produces a fair amount of vapor with little heat. This is why most people get into rebuilding, it allows them to tailor make their devices to their liking. If you're trying to go with a pre-coild setup, then you'll have to just search for the best tank that you can find. Just keep a list of what you liked about the tank, what you disliked, and see if you start seeing similarities. Bring a drip tip with you when you go to the vape shop, and ask to try some of the people's devices. This is a bit forward for some, but most people don't mind sharing as long as you have your own drip tip. keep track of what you like, and what you don't like. You may find something you like that you may never have thought of. And of course, ask questions... not just to the employees of the shop, but some of the customers as well.