Not quitting when is hard is one of characteristics that successful people possess. Doesn't matter is it trading or anything else, you never try once and quit if you fail. Famous quotation is "I didn't fail 1000 times, I found 1000 ways that don't work, 1001 will work hopefully". Now with trading there're so many different strategies, siffe9coins and pairs, you need to try many things before you find your perfect pair and strategy that suits your skills, your goals and your time for trading.
Thats right, dont lose hope or be discourage everytime we fail. Its just part of the process that we need to face in order to improve in this career that we chose. Look at the bright side once you fail, you can learn from it so dont give up and apply what you have learn from that experience. As time passes you'll understand further the nature of trading and might become a pro trader that earning good amount as sideline or full time.