If you want "clouds bro clouds" your not going to get that with high nic without the burn. This is the reason most high wattage vapers use 3 mg juice. Even at 6mg It starts to get a little iffy around the 80 watt range. I capped out around .4 ohms and 45 watts using 12mg before I decided to delve into a denser vape. And even that % was pushing the limit for my personal tastes. Also, your nic level is not the only factor to the amount of nic your consuming with each hit. High wattages burn more juice faster. So, at 3 mg and 100 watts it feesable to get the same amount of nic as you would with a 15mg at 20 watts (I honestly don't know the true ratio numbers here ... I just use that as an example to show what I mean).
The vape temperature (aka cool/hot/warm) is relative to each persons own tastes. Warm to me tends to be hot to many vapers. Hot to me is, on average, unbearable to a good majority of people.
Also, the vape temperature is determined by the build, atomizer, and airflow choice ... not just the wattage. For instance, I'm tokin on a compact .13 ohm dual coil at 105 watts on an airy atty right now and it is a comfortably dense vape that is warm but isn't burning. If I where to put a loose .13 ohm single coil in a more restrictive atty and try to vape it at 105 watts it would get HOT AF and burn the hell out of my throat. In turn, I can put a .5 ohm build on a different atty at 150 watts and it honestly isn't much "hotter" that the .13 at 100. It certainly might make you choke, if your not used to it. But, not because it's hot or burning ... but because your inhaling a hugely dense amount of vapor in comparison.
My suggestion would be to grab a good 24-25mm RTA with a large range of airflow. This will allow you to experiment with builds until you find what works for you. My other suggestion would be to not discount different vape styles until you've tried them. I'm living proof of that fallacy. I would never have thought that high wattage would be my preferred vape style. I spent almost 6 years steering clear of it because I thought "there's no way I'm going to enjoy that". I wish I had tried a loooong time ago ...
Wire selection is pretty easy. For a true beginner I would grab some 24, 26, and 28 KA1 (Kanthal) or Ni80 (80/20 Nickel Chromium Alloy). You can find wire suppliers, and reviews on them,
HERE
My personal selection for cotton is Cotton Bacon Prime. Been using cotton bacon since V1 from years ago. But there is a myriad of choices out there. And you can always just buy plain old organic cotton.
There are only a few tools you NEED for basic building: 1- Something to wrap your wire around that you KNOW the diameter of. I've talked to people that use all sorts of things. I know a guy who uses knitting needles. Honestly though you can get a coil builders jig for almost nothing. 2- Something to cut the wire with. 3- An ohm reader (or quality regulated mod) to make sure your resistance is acceptable. 4- Scissors
Here are some suggestions to help a little more - Ceramic tweezers, Needle nose pliers, A good
Coil Calculator
Edit: All the links in my post are good accept the pliers ... I didn't put that one in. VU tends to auto link key words like that lol