how can I motivate him for studies and for his career

A. Honestly you have to show the harsh reality to your child by saying see that it is very important to earn money and to earn money you have to be educated so you can do whatever you like to do whatever I feel you are interested in but you have to study to go into a good college or Institute for further studies and when you score good then you get good colleges in good companies who are going to recruit you with regular counselling with positive words such child is going to learn but don’t pressurise too much so that the child lose his interest you have to find a proper approach to teach these things to the child