Fortunately, the human body is ridiculously adaptable, and just like with any new fitness/workout/physical regimen, reaching a new normal is surprisingly rapid. I'm very thankful for my massage gun. Luckily, I'm only stocking two days this week, so I should be less worn out so much, leading to spending my evenings doing the creative. I was able to pick at things some this week.
Even better, this job is definitely not permanent. The location where I'm working is closing in the next two months or so, which is just buying me time to get more creative feelers out and try to find some freelance writing or voice work to help pay the bills. Until then, the physical retail job it is.
At least I'm getting in exercise. Long-term low-impact walking and some lifting, so cardio and strength endurance. Low weight - high repetition. I call it a win.