Is life just a way to kill time?

I often find myself thinking about the purpose of life and what it is that I truly want to do.

Sometimes, I find myself agreeing with the words a classmate said back in junior high: "Life is just a way to kill time."

Yesterday, my heart felt warm when I savored the deliciousness of a hot pot.
Perhaps I only felt that way because I was eating something warm during the cold winter, but in that moment, I realized that being able to enjoy this flavor is happiness.
It might be that, not just with hot pot, I would be satisfied if I could eat, sleep, and have sex with peace of mind.
I was happy when my money increased through investment trusts and individual stock investments, but I am reminded that money is ultimately just a means to a life that satisfies me, not an end in itself.

There isn't really anything in particular that I want to accomplish in life.
I am sometimes impressed by the science, technology, and structures that our predecessors have built, and I get motivated to develop some technology that I can leave behind, but in reality, I don't really care who created what. Even if I tried to write a book as proof that I lived, bookstores are filled with everything from masterpieces to miscellaneous books, and if I were just going to get lost among that "rabble," I would rather spend my time on things that warm my heart than on a sense of achievement.

Ultimately, what matters is how it is a plus for me, and who created it is not that important to others.

Even so, I want to support people who work hard toward their goals, driven by their own interests without ulterior motives, and I feel like I want something that I can be that passionate about too.
I think these feelings give hope to someone like me, who wants to deny the phrase "life is just a way to kill time" but finds it strangely convincing.
It doesn't matter if it's just killing time. I want to find a "self-satisfying way to kill time" that I can feel is fun and gives me a sense of achievement.