Never be depressed in life because when frustrated, people lose everything. And so if you can't do something without being frustrated, be patient. Or think and give yourself time. Think then you will find that you must find a way.
If you do not find any success, think deeply about patience. You will certainly find success. You can compare life to a war where you lose and prepare yourself as a warrior. At last you will always have success.
Life is a war field where to sustain oneself. You have to fight against it on a daily basis. The present is a time of challenge. Where people fight against each other all the time. If you do not fight, you cannot survive in the present. And so whatever you do in life, make it competitive so you will find success in every field. And just like that, if you can make life as a warrior. But you will succeed. Because a fighter is always ready when he has to fight against the opposite fighter. And make it your life as a warrior or as a warrior.