I am new to crypto and I want to learn how to trade but I do not know where to start. Please give me some advice on what are the best exchanges where I could learn how to trade. Your advices will be highly appreciated. 
I often think Crex24 is simply to use for a new Crypto trader. You can even appreciate it using mobile device. But there are others. I haven't used so many exchanges but you can try Crypto-bridge or coin exchange. Another nice exchange to be launch soon is shardex. It will be exchange and staking pool in one.