Imho it looks not even close to legit...

Market a custom skinned bitcoin Qt wallet as unique is a red flag for me. Beside that the ANN doesn't look like a professional designer would have done it.

Hope that i am wrong and you don't get scammed...

Yeah the main net launched according to the schedule.

Mining will be available for all OS's...
not sure about hive OS, but we will see once the project launched.

Regarding the experiences with the x16r algo, which is the base of the custom x16rt, I would assume NVIDIA cards would perform slightly better...

Atm there is no possibility to get this coin, not even with mining.
The Mainnet will start at December 8th... once the Mainnet started there will be possibilites like buying on an exchange or mining.
Another option would be through the bounty program (once that has beeing started).