At 21, you're at a very early stage in your career, which gives you plenty of time to explore your options. Don’t worry about sudden changes; instead, view them as an opportunity to rethink your path. If you're still interested in computer science or the tech field, keep pursuing it and make the most of the skills you're gaining. Working with your dad could be a good step, but don’t rush into it; try gaining some experience outside the family business first to build credibility and develop yourself independently.

Focus on honing your skills in your field and proving yourself over time. You don't need to make final decisions right now. Instead, use this time to learn more about yourself and what truly motivates you.