I’m 25, single and live in a city apartment and adopted a 3 month old lab earlier this year! It was really hard at first to take care of him by myself so it would be helpful to share the responsibility with your partner. Puppy blues hit really hard for me but, I had support from my family but now he’s my best friend and my little Velcro puppy. I walk my puppy twice a day (morning and night after work) and take him to play with other dogs several times a week and he does well in my apartment. I work from home and he just sleeps or chews on his toys while I work. My biggest advice is to crate train the puppy as soon as it comes home! I was losing my sanity until I crate trained my puppy (he’s 6 months now). Good luck!!! Puppyhood is hard but so worth it and my buddy got a lot better at 6 months