About on buying bittorent then
Binance and Kucoin would be the best place.
I second this and aside from those exchanges, you can huobi. Bitfinex is also a good choice. There are many of them you can choose from the link that's given to you above. But some of those exchanges are already asking for KYC IIRC. Choose wisely but the best of them all is to choose Binance.us.