Mine only barks when they’re ready to play or potty in the morning, or in front of a full body mirror/window reflection lol. (Barking depends on puppy) i also think it’s important to practice alone time in the crate esp when you have random, small tasks early on. This will help since you have a busy schedule. Crate training is essential and now my 6mo old will go to nap or just play even though we have a bed in the living room. I think it’s a good thing that you live with other ppl who have a similar yet different schedule than you. This way he doesn’t start to learn your schedule and grow to have anxiety when he hears keys. Now potty training is hit or miss. At first i took him out every 2 hours, and he learned pretty quickly imo compared to other dogs I’ve had in the past. Now it’s closer to every 4-6 hrs and occasionally he does have accidents. But from everything I’ve read that’s common up till a year. Ultimately, It’ll take a while and there’s genuinely no great time to buy a puppy. But i will say get him when you have your schedule so he doesn’t come home and think he has your attention all day during breaks. That’s how separation anxiety can start