Dude my last job was also just a hell ton of driving so I feel you. Some days you run into traffic and it's like...I could walk this distance in 20 minutes but I'm stuck here for an entire freakin hour omg.
As for stress, it helped to take my art goals and break em down into very small chunks, which I manage through Asana. Asana keeps track of my schedule so I don't have to. I will forget my deadlines and that's just more stress so I let a computer be my secretary. I'll have items that repeat every day or every other day (like checking Gmail is a daily goal, and that's every day, longer term painting series are another goal that might repeat every 2 days, etc) and then tell myself, yeah I have this much to do, but if I only accomplish 3 things that's OK. Because sometimes the other job just...bleeds into the rest of my time, youknow? Like I'd come home after 4-5 hours on the road from place to place and be like "I almost died three times today in traffic. I'm gonna watch youtube videos of people making cakes, screw art" and that's OK.
And like sometimes I'll have a goal on Asana that sits there for like a week and I can be like "why am I procrastinating this?" and I'll break it into half and see if I accomplish it then...and if it just never gets done I can ask "Was this worth doing anyway?" and I might just delete the project entirely if I clearly am not doing it. It frees my mind of clutter that way.
Like sometimes you have to accept when there's just a lot on your plate and you're one person, and you're doing a lot and you're accomplishing more than maybe you see. Stress makes it hard to see our own accomplishments, so we think "if I just work harder then I'll get this anxiety off my back" when the answer is to do the medical ways of dealing with stress--a light workout for 15 minutes (or a yoga video, those are really nice to do), catching a coffee with a friend to vent about your day, going on a light hike to get some oxygen flowing, venting to people who support you and will be like "no man, you're fine. You're getting there", cleaning a shelf in your closet to get the stress of disorganization off your back (I'm a tiny bit OCD so I get great pleasure out of having a clean closet), playing music, etc etc.
But like what I've most realized is when I feel super stressed it's also because I might have too many projects and I'm trying to accomplish them all at once as if I'll die tomorrow...so I'll assure myself that I'm not dying tomorrow and I'll put some projects on the shelf. If my update schedule is too much I'll make it more lax. If a certain social media platform isn't working well, I'll delete my account. Overall, I find it helps for me at least to only focus on like 3 big projects at a time until they are finished, because finishing things is where I improve the most.
Also, and this is sort of silly, but my stress reached this tipping point a few years back and so I started a side blog where all I do is make photo recaps about TV shows with my brother. I never market it. It'll never make me money. I don't care if any one else sees it. It makes my brother laugh, we have a good time. It's something nice to look forward to because I enjoy writing, and it reminds me of how I used to write before I became an adult and before storytelling became something I had to do Perfectly. I think everyone needs a hobby that doesn't make a dime but still gets out that creative itch in a way that has nothing to do with your job. Have a place in your life that is free of monetization.