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 think that at this point you should limit trading, you can see that bitcoin prices have been fluctuating in recent days and can be seen that the market is bearish in long term and current price bitcoin fell to $ 5800. I believe bitcoin prices will probably continue to fall sharply, so at this point you should not trade to avoid losses.