The first thing you really need to know is to do a lot of research about trading and in what sites are good for trading. You also need to understand gow trading works and all the things needed to know. Basics is just enough if the money you'll be trading is big.
And always keep in our mind to always love what we are doing especially when we want to do trading in our life, trading is not really easy so it needs patience and courage to become successful here. Basic things, trust yourself make sure not to do panic when you are seeing that the price becomes low.