1-I am so happy that you became a good student and got the best grades; it is honestly never easy to achieve, but you did it :D
2- Like you said, it is all about our mindset and how we conceive things in our heads. You first knew how to set up your goals and then made yourself remembering them and implementing them in your mind, so that you take the right steps to achieve it.
I hope one day you become exactly what you wanted to be.
I'll resteem your post because I know it would be very helpful and inspiring to many of my followers.