How to stay productive on work as a 16 year old?

Hey guys, <br><br>I work at a gas station and I am working from 7:30 PM to 12:00 AM. I am a 16 years old, this is my first job and I am working 30 hours a week, so I have 3 days off. I feel like its really hard to stay motivated and productive, I want to work with productivity everyday but I dont know how to do it, so please help me!<br><br>When I am off work, I tend to sleep more than usual, like too much sleep, I feel like I am wasting my life in sleeping. I dont want to sleep alot during my days off, I want to be productive but I dont know how to do it.<br><br>So what are some tips that can help me to become a productive guy at 16 years old, and how do you stay productive everyday?<br><br>I dont want to regret my life like "Bro, I got only 30 hours of work in a week and I had alot of time to do stuff but I didnt, what a waste of time."