I own the Sig 75Watt, IPV D2, and Smok Xcube 2. Out of the 3, the Sig75 does TC the worst (Thats not to say it does not work though, it just doesn't do it as well).
For the price, you could get a D2 which is actually cheaper, 75 watt/50 joule in TC mode.
Getting onto your question,buy TEMPERED NI200. It is not soft like normal NI200, so It will feel like you are building with kanthal. Get some 30, 28, and 26 gauge (I use 26 for Single coils, 30 for dual coils as it is otherwise too many wraps).
It takes about 13 wraps a side for dual coil with 30 gauge, with 26 gauge it is about 30 so not possible really lol, that is round a 2mm driver so if you want less wraps use a 3MM, but I found 2mm to be the best as I only have 30 and 26 gauge at the moment. 28 Is more ideal as it will be about 10 wraps.
Its not scary, do not be scared. Your device is simply stepping down the voltage when it hits your set temp, to try and keep it around that temp, once it is reached, it will drop power, untill it reches heat again, then drop, and this happens multiple times in one 5 second pull (or 3 Second, whatever you like really)
With 30 gauge it is 6 wraps around a 2MM driver, to get 0.1 which is within TC's working range. If I want it lower, I simply remove one wrap and it usually is between 0.06-0.08 Ohms.
Its not any more dangerous than vaping normally, they are designed for using really low builds, thats how the TC works, they are working on TC with kanthal but it is hard as the resitance is much higher.
I hope this helped, I was also scared myself at first, even though I owned a 150 sig and such, but there is nothing to fear.
I only use a 25R now, they are the best all round battery, and going over a few amps should not be bad I have been told by a battery expert as samsung is liberal in their battery ratings.
As long as you follow safety advice, charge safely, and try to keep within amp Limits, you will be fine.
If you have any questions feel free to ask more on here, or I don't mind a PM if you want more peace of mind. I do have more of an understanding of standard regulated devices, but also now know TC devices due to another forum I visit.
Enjoy your new vape! Please dont get the Sig 75, they are releasing a sig 75 watt pluss to rectify issues in the original, like only getting 20 or so full pwer pulls, they are using a 26650 in the new one which makes more sense, and 18650 does work fine, but you will not get long at 50 watts +.
I usually use mine in TC at 40 watts max, usually 30 watts set at 250C and I get a fair battery life, but the D2 beats it easliy. I would either get the D2 or wait for the new Sig 75.