If you’re just an average person, there may be a lot of things worth doing in your life, but if you look at it from the outside perspective, it might look dull and mundane. The value of your life doesn’t depend on if it entertains a hypothetical observer, it should entertain yourself living it. Besides, a lot of people who do end up epic characters of some sort with ‘a lot to show for themselves’, like Hemingway or Einstein, end up buying into their own LARP and ultimately become a miserable person trapped in a character. It’s like sacrificing your well-being to your ego. And ultimately all of it turns to dust and even the greatest figures in history are barely remembered.
Better to live for living than for the story of your life. That said, it’s never too late to start making interesting choices and crafting a wild adventure for yourself. That, in itself, can be a very worthwhile way to live. I just think you shouldn’t get too hung up on it in terms of a narrative or legacy.