Decide how you will finance your trading in advance: Only one kind of money is good for investing, and that's the kind that you are willing to lose, and preferably without damaging your physical and/or mental wellbeing in the process. Every profitable trader is profitable in their own way, while every loser experiences losses exactly the same way. Remember, use every available opportunity to learn. It's a never-ending process!
By contrast, if you just traded 20 EUR, a loss would not significantly affect your account balance. It would provide you with the opportunity to learn from your experience and plan your next trade more effectively. With this in mind, limiting the capital you are prepared to risk to 5% of your account balance (or lower) will put you in a better position to continue trading Forex (and improving your technique) over the long term.
From cashback, to a no deposit bonus, free trades or deposit matches, brokers used to offer loads of promotions. Regulatory pressure has changed all that. Bonuses are now few and far between. Our directory will list them where offered, but they should rarely be a deciding factor in your forex trading choice. Also always check the terms and conditions and make sure they will not cause you to over-trade.
The blender company could have reduced this risk by shorting the euro and buying the USD when they were at parity. That way, if the dollar rose in value, the profits from the trade would offset the reduced profit from the sale of blenders. If the USD fell in value, the more favorable exchange rate will increase the profit from the sale of blenders, which offsets the losses in the trade.