My feeling is that you can work hard and stay healthy and live a long contented life and die. Or live a short unhappy unhealthy life and die. Either way your memories and your consciousness drifts away like a puff of smoke and it will be as if you never existed. So do what makes you happy. You don't have to accomplish anything. Plenty of people will. You can do absolutely nothing. Plenty do that. You are one of 8 Billion people on this planet. You are insignificant.