I think that it is better for a beginner to start his acquaintance with trading using not very volatile trading pairs, such as EURUSD. Also, many brokers have minimal spreads for this pair (for example, my broker has a spread of only 0.1-0.2), which makes it possible to earn even on small price movements. This pair is smoother and more predictable, and due to low volatility, it is possible to set small stop losses.