I´m starting with
Futures Trading, just training with some videos, tutorials, articles... It seems to be interesting and could lead big profits.

What exchange would you recommend to start?
I heard about Bitmex, BBOD and CryptoFacilities, but not sure what are the differences between them.
Any help would be useful.
Thanks! Number of best exchanges are available in Crypto platform so better you should choose the right coin or token then check the market exchanges you will get good results.
But do not wait for future trading because currently all the coins are down in the market so you will start journey soon, you will earn good profit in trading platform.