I am new to trading.Please suggest me some good marketplace for trading.
First, change the marketplace to exchange. That's what we are calling here in cryptocurrencies. And, there are a lot of exchanges such as Hitbtc, bitstamp, trex, binance and many more. Just pick on what coins you want to buy.
For beginners, i'd stick to more established coins, probably those that are in the top 10 just to familiarize myself on crypto basics. And most exchanges support these coins anyway. Practice will small amounts. If you're just starting, it's all about gaining experience.