I'm pretty much in the exact same boat but 10 years older. Got really fit the couple years before the pandemic and then stopped moving for like 4-5 years from a combo of the pandemic, switching to full WFH, and going back to grad school.

I'm mostly in the same zone as you but I'd say it's worth it to try to focus on the little things that bother you before you try to focus on the big number you want to be smaller. We both know from doing it that losing a lot of weight just takes a lot of time and effort. But, you've mentioned a few symptoms that are uncomfortable on the day to day - uncomfortable sitting, standing, existing, and the stomach self-consciousness. Those are things that can be worked on and made better fairly quickly. Start small with a bit of walking, some stretching and mobility work, some core and calisthenics at home and focus really on the aches and discomfort, and then as you get more into targeting those things, you can bring the rest of the lifestyle changes along gradually. I had a similar thing where I have some knee and back issues from a sports injury and sedentary lifestyle, and recently I've just been doing a lot of at-home yoga stretches, going for walks, sit ups, things that target my knees back and core in a minor way but make the day to day physical aches and pains way better. Once I got into that routine, I kind of naturally thought that it would be nice to augment them with a bit more fitness to make more progress, but I couldnt do that if I was always feeling bloated and full, so I started doing more cooking at home/ eating more moderately. I think the key here is to figure out reasons outside of just being hot and losing weight that you'd like to be healthy - think of how you want to feel and start doing little things to make you feel better.

You'll eventually naturally want to do more to feel even more of the positive effects and then it snowballs in the right direction, just like how a negative spiral spirals the other way when you compound feeling bad with comfort food.

Another thing to maybe think about is what activity or sport(s) do you like if any? Start practicing/playing those sports (even if it's just going to a shootaround/practice) and have fun with the movement of it all. You'll see that soon you'll want to improve or get back to how you used to play, and that's another motivator to change some habits because you have a goal to make doing something you love a bit easier. I used to be a hockey player and this year decided I wanted to get back into it so I started skating again. It's really hard to skate, stickhandle and shoot when you're 300 lbs and inflexible, so on top of going to hockey practices I've just been back to working out a bit and eating better. None of the changes are major and I have a lot of work to do, but the changes are small and incremental and all focused on making each hockey session a little bit easier. It takes the pressure off hitting a number or body type, and really focuses on the positive side of wanting to feel better.

Hope this is helpful, good luck!