People who say it's never too late, tell me how to escape the 8-6 trap?

I have no energy after work. I want to prepare for competitive exams and follow my passions too. How do I do it now? Doing it in that 2 hours you get at night is just not enough.

People tell me I have a negative mindset, so if I get a positive mindset, will this 10 hours of time waste be gone? Will my parents stop asking me take care of their failing business on weekends?