Welcome to the SDMB Scipro8! You’ve come to the right place to figure out science! Most of us here will be glad to help you understand things, without looking down on you, because we realize we don’t know everything either. Keep asking questions, and stick around and read even if you don’t post. I’m glad to see someone coming forward to learn more, keep your thirst to learn. 
Which unfortunately has a triple point at 64 °C, so you have to heat it up too hot for your lungs to handle before it’d gasify.
No superlow-radioactive voices for us humans! 
SF6 is a much better insulator than air. It is not uncommon for high voltage lab experiments to be installed in an SF6 tank.
This stuff is great, where can somebody get a tank or two of it?
You can buy tanks of gas online from BOC in the UK, Asia, Europe and various Commonwealth Countries, and Linde/Spectragases in the US. You may be able to order it from them (possibly online). You may run into problems getting them to sell it for use at home though.
I hope your experience is better than Scylla’s.