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. 
You can always look for an exchanger like kucoin where is tarted investing cryptocurrency and i did not get any problem from it investing on that market but still you can always look for another, youtube and google will be your best way to have guidelines on trading.