Start by minimum $50 or $100 is good amount. You have to learn technical analysis first, go to the coinigy or cryptrader site to learn it. And to learn fundamental analysis subscribe some youtube channel from expert trader. About technical analysis there are alot of video tutorial about it in youtube and in google.
Nice advice, this is the safe way of investment with a little amount of capital and the easiest way to learn how to trade. With every decision of moves in trading, we are learning because i am sure that whenever you do, you will surely end up losing no matter how much you play safe in trading.