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.
Good suggestions indeed. I think amount doesn't matter for trading. You can start with $10 only. Matter to focus on is your patience, emotion control and expertise in trading. You can trade with $10, but while trading, you must have some strategies. Avoid emotion, be stagnant to your strategies and keep learning continuously on trading from different tutorials, e-book and youtube videos. Whenever you will be confident enough in making profit from good trade, invest more with your existing fund.