Some day I or someone else will look back on my life, and I or they might or might not think that I lived an interesting life. But I am pretty certain that it will be rather clear that I tried very hard. And I guess that's what it's all about. You're either trying something or you're not. That applies to living an interesting life, losing weight, getting faster, being nicer, eating healthier or making a bunch of money.
There is no guarantee in life that you'll succeed at anything.
But you can always try.