You can trade EURUSD as a regular currency trading pair because this pair is comparatively less volatile than others. Execute your strategies on their platform to see whether it makes good return for you or not.
Initially we should select two to three pairs for trading and keep analyzing on those pairs to see which one works well. And thus we can filter out pairs.
Understanding is very important for selecting a good trading pair. For example, I understand and my analysis works well on XAUUSD so I selected this pair for trading.
When you have enough trading experience, you can earn better profit. Watch video tutorials and practice more and more on demo account to increase your experience.