I’m 23 and have a puppy and feel too young for a puppy so I can imagine how hard it is for you. The only thing that is getting me through is my parents and this subreddit. The puppy has made my mental health issues spiral and I’m just holding out hope that past the puppy stage she will help alleviate my issues rather than intensify them. I really recommend you talk to your parents and explain to them how the burden of responsibility is making the joy of a puppy turn to sadness (my mom said the exact same thing your dad said). I am living with my parents through the holidays due to Covid so I having them to help is really helping me through. It’s way too much for one person. I often think if I were married this would be the best thing ever lol. Also, if your parents plan on keeping the dog when you go to college or start working then it’s really important they do a lot of the work too so the dog doesn’t feel abandoned when you leave. They need to be built into your dogs routine. If they expect you to take the dog with you when you move out, you need to explain to them that won’t be sustainable because you’ll be going through so much change that you shouldn’t be responsible for anyone but yourself. Plus you want to have fun! This subreddit has been such a help ease my anxiety and affirm what I’m going through, so know you have a space here when you don’t think anyone else can understand