How did he overcome family and colleagues' doubts about his age?

He overcame his family and colleagues' doubts about his age by directly addressing stereotypes and demonstrating his capabilities through action. 

Instead of arguing or becoming defensive, he gently challenged ageist remarks—showing, not just telling, that older adults can stay active and adapt to new skills. For example, when family or coworkers assumed he couldn't handle something, he responded with calm confidence and took on the task, proving his competence.

He also embraced his age and experience rather than hiding it, using his wisdom and perspective as strengths. 

By staying independent, seeking out new knowledge, and involving others in his learning journey (such as asking his kids for tech tips or collaborating with younger colleagues), he built respect and trust. 

His openness to learn and willingness to adapt helped break down doubts and showed that age is not a barrier to growth or contribution.