Okay kiddo, let me try to explain what a first professional degree is to you.
You know how you go to school and have a teacher who teaches you math or science or English? Well, when you grow up and want to work in a certain field like becoming a lawyer or doctor, you need more education too. A first professional degree is a type of higher education you can get after you finish your regular college or university studies.
It's called "first" because it's usually the first degree you need to pursue a specific profession. For example, if you want to become a lawyer, you would need to get a first professional degree in law called a Juris Doctor (JD). If you want to become a doctor, you would need to get a degree in medicine called a Doctor of Medicine (MD).
These degrees help you learn everything you need to know about that specific profession, including the rules, laws, and practices that you need to follow in order to be successful once you start working.
Overall, getting a first professional degree requires a lot of hard work and dedication, but it's worth it if you want to become a professional in your field of choice. I hope that helped you understand what a first professional degree is!