Only do this if you're serious. Depending on the animal you could very well just add another negative thing to your life. There are upsides, sure, but there's nothing that feels great about walking into your bedroom and getting a nasty look from an animal you put hours upon hours of work in per week for because they don't like humans.

I do love animals, but I’ve always been intimidated about the responsibility of being the person solely in charge of that animal’s life. I’ve always struggled with routines and such (I found out in adulthood I have ADHD).

I have thought about it lately, though. Maybe having that responsibility will cause other things to click into place? However, I’m worried about it not working and impacting a life beyond my own.

Your concern is more of a sign that you'd be a responsible pet parent. I don't have experience with dogs (rescue or not), but caring for a cat is relatively straightforward and can bring lots of joy. Writing this with a cat sleeping on my lap, who showed up in my backyard a few years ago.

Caring for two cats is even easier because if their human is boring because of concentration, they can entertain each other. Works here, and with rescue dog in the mix too.

Also, if the dog is fond of walks and hikes etc, that’s possibly super healthy for a break from sitting and working. As the joke goes, "Ask me how I know." :)