Single with two dogs advice?

Currently: I have a 10y male cat and a 3y female Pyrenees/husky. We live in quadplex with a small and narrow backyard but a large yard in front. I work at a pet hotel and I bring my dog with me pretty much every day (excluding the few times we are packed which is usually just for holidays) and I take my dog hiking or on nature walks at least twice a week(every off day). My dog is mostly off leash trained but we are still working on her stay close/heel command.

I have been planning to get another dog for my birthday for the last 7 months but as it gets closer I get more hesitant.

I’m mostly worried about training and hikes because our frequent trails have narrow spots. I plan to take them separately to start with(except for when we go to sniffspots) just so I can continue to perfect my current dogs off leash and start the new dogs general training and make sure they are still bonding to me(another BIG concern). But I also know I’m most likely going to feel guilty during the outing because the other dog is at home in their crate. I also don’t want them to get jealous of each other because of that or just when I’m giving them general affection.

I also always thought you shouldn’t have more pets than you have arms in your household (in case of emergencies) but if I don’t get another dog I want to get a ferret(which comes with a whole other set of anxieties 😭😭) so I’m trying to get that out of my head.

Lastly I almost adopted a husky about 5 months ago but didn’t go through with it because a Lot happened during that month but I still can’t get over him :(( I feel like I made a big mistake even though logically I made the right choice. I worry I’ll keep comparing them for a while after I get the new dog or I just won’t be able to get over that husky even when I’m happy with my two dogs.

I guess I just want some advice that you guys found helpful or what you wish you knew before brining in another dog when it’s only you? Do you ever regret getting your second dog? What were things you didn’t account for? Give me it all 🙏🏽🙏🏽