I heard that someone can make day trading easy but in Bitmex exchange, because the advantage of using Bitmex Exchange there is no trading fees, unlike the other exchange site. But I don't feel safe using their exchange.
So I think it is only good to start with a small amount for a day trading and learn first until you can make a profit with a small amount. If you can do that then go for big exchange and invest little by little to maximize your profit.