My advice to you will be the following. It's very important to carefully select the place for buying and trading. In terms of convenience, it's better to stick to fiat-to-crypto exchanges (like Coinbase or
CEX.IO). That'll set you free from wandering around one exchange to another.
Indeed, traders should be more careful when we're talking about the trading platforms which they'll want to trade on it. My advices are basically the trading platform as well as they need to just start with low amount of money because as a newbie you'll obviously loss some money in their starting thought.