@thornbearer I am here to tell you: it will only get better. Seriously, seriously.
Post workout soreness, or DOMS (delayed onset muscle soreness) is common after doing movements that are new to your body. Being a beginner is impacting you there, for sure. Being obese probably is not, I don’t think. You can get your body used to movements and build muscle at any weight or body fat level.
I will say that for myself and I think many people, soreness is also exacerbated by not having enough nutrients in your system. Protein absolutely is important. So are fats. So are carbs. Please do consider rounding out your food.
Sleep can also be impactful. Right now as I type this, I did some heavyish lifts the day before yesterday, and I slept poorly last night. I’m a little sore. It does happen.
Either gentle movements (walking is great) or just getting right back at it in terms of workouts will lessen soreness. I might go for a walk today or I might do a normal-for-me heavy lift this evening, I’m just going to see how I feel. You can get through this!!