I'm currently in my 3rd year of medical school where I am training to become a physician. I think it's great that you're exploring the possibility of entering medicine. It is definitely a career that will take a lot of dedication and time to pursue so it's good to understand what you'd be getting yourself into beforehand.
As someone who is nearing the end of her medical school training and will begin to apply to residency training (residency training is where you actually practice as a doctor with supervision ) , I can say that entering medicine has been worth it. It is a fulfilling career where I know each day I will be challenged and learn something new everyday. I talk to people from all walks of life and try to support them and make them feel better in the best way I can. Medical training is tough- regardless of what you decide to become - I won't sugar coat that. But at the end of the day, I know that I'll spend the rest of my life doing something I know is meaningful and that I genuinely care about. Everyday is different for me whether it's seeing patients in the hospital or seeing patients in the clinic, there's always something new to keep me on my toes.
One of the first things to consider when entering medicine is what kind of role you want to play. There are many essential players when it comes to taking care of people. There are doctors, nurses, physician assistants, medical assistants, nursing assistants, the list goes on! Maybe you could reach out to family, friends, or even search on YouTube what these kinds of jobs entail. You should also consider the length of training when it comes to these professions.
For example, with the two that you've mentioned:
A pediatrician is a physician who will attend 4 years of college, 4 years of medical school, and 3 years of a pediatrics residency program. You can even do additional training afterwards and become super specialized in a certain topic.
I am not as well versed on the nursing school years, however, I know programs generally can vary between 2-4 years.
So, is becoming a nurse or a pediatrician worth it? It's an answer that you have to come up for yourself. It's only worth it if its something you whole-heartedly choose for yourself and that you can't see yourself doing anything else. Ways to figure out if it is something you'd like to pursue would be to do some shadowing or volunteering!