By the time I was 29. I got a degree. Spent five years in USN. Two in VN. Four years with Fortune 500. Lived in Japan Hong Kong and Manila. Never missed a month without a pay check since graduating. Supported wife and two kids. Who had better life experience? Lots more like me in my generation.
Excellent life, sounds like! I sure would be proud of you if you were my son! But not everyone has to have the exact same life. Maybe your own brother did things differently but also had a good life. Maybe he never married. That’s ok too. I don’t see a problem with following a Dream in your 20s.