I think, each person can become a successful trader. So, i ask about platforms which is simple to use
Being "simple" to used will depend on how you understand their interface. We have different preferences at each platforms and if someone is comfortable using a certain exchange, it doesn't mean everyone will have the same experienced.
Almost all trading platforms have the same interface. Up to you if which of them will be simple to used for you.
Refer to those mentioned and suggested platforms here and check it for yourself.
People do have different ways on seeing how simple a certain exchange would be but as said most of them do have the same interface where pointing out
the different among them wont really be that hard.Choosing exchange will vary on your preference on where you do suit up and make you comfortable on your trading activity.For now
Binance would be a good choice.