yes exactly , exotic pairs are not necessary , but for increase your trading performance very rapidly you can trade that pair in demo to see the performance how it works.
this is an open secret that market is too much risky to predict something , but the main deal is are you able to handle this risk by your trading experience or knowledge ?
the beginners should choose the broker which is more appropriate to the concept of trading that will be used , if love doing scalping should choose the broker which allows trading concept such as this.