If you are looking for purpose in life, have children. The purpose of all biological life is reproduction. I can tell you from my own experience that my kids provide me a ton of purpose and direction.
If you are looking for meaning, focus on your relationships. Do DIY projects with your grandpa and dad. Go out to lunch with your mom weekly. Host the family Thanksgiving and Christmas. Help your uncle build a shed. Go on long bike rides with friends.
Outside of those things, I have most enjoyed visiting national parks and camping. I really enjoy construction, I am working on building a shed then an ADU then a full house.
Maintaining a healthy diet and vigorous fitness is critical. Avoid risky sports that could injure you.
I continue working on my business and have pretty much decided to never sell it. Too much of my blood, sweat, and tears are in it. I’ve made too many promises to employees and clients that I can’t guarantee would be kept by a new owner. And I enjoy it.