One of those brothers became a police detective. I hope you're curious. I hope you enjoy getting to know how things work. That's the first step in opening up the wide world of technology. Curiosity is the quality that will make you a successful inventor.
Curiosity is even more important than the ability to get the highest grades.
Some of the best engineers in industry were not at the top of their class in high school. If you don't have high grades, don't be discouraged. Don't let it keep you from doing what you want to do. If you've got curiosity, you can go far. That's what motivates you to learn and succeed.