Hi! These are the most wonderful dogs! I'm sure everyone on here would agree with that and if you type any topic into the "Search" you'll get lots of info.
I have 3 children, aged 18, 14, and 12, and they aren't always rushing in to help with dog stuff! The reality is that, unless you're home schooled, your parents will provide most of the care for your dog. My kids are gone at school all day and then have activities after school. They like to sleep in on weekends and spend time out with friends. The first few months you have your dog will require all of your free time, except you really won't have free time because you'll be so focused on your puppy. Potty training, socializing, training, walking, grooming, all of this takes a lot of time. These dogs are companion animals and want to be with you all the time, you'll have a little shadow that follows you everywhere.
Also consider cost of care. Vet bills, heart worm medication, flea/tick meds, grooming, food, and toys.
I am in no way trying to discourage you from getting a puppy, just telling you that the reality of it is work! It's so worth it though as you'll have a dog who will give you so much love!!!
Just give it lots of thought and talk honestly with your parents about the commitment involved for the whole family. Lots of dogs wind up in shelters because people don't quite realize how much time and money is involved.
You sound like a very mature 16 year old and as a parent of teens it makes me happy to see you give this decision so much thought. Please let us know what you decide after you discuss it with your parents. Good luck to you!!!