If you want to trade start with a small amount first. As you are a newbie I suggest you stick to top 10-20 more or less reliable cryptocurrencies for trading. The choice of best crypto is as important as the reliability of a chosen trading platform. In this regard, I’d recommend you Cex https://cex.io/eth-btc as a good place to start trading, due to its intuitive interface. For diversification of your portfolio, you can invest in Monero, Stellar or IOTA but first, do your own research.