

There’s a really good video on this - https://www.youtube.com/watch?v=vSSkDos2hzo
Adding a little exercise to your life is rarely a bad thing, but to shift fat diet change is the big one.
Here’s one that will have a steady impact - drink an extra glass of water with each meal (helps you feel full for longer), and invest in an apple corer (for easy apple snacks) - aim for an apple a day. It’s helping me slowly lose body fat by reducing caloric intake.
Tricky one to weigh up there. It might not be that you’re lazy, you may well just be burned out, not working effectively (i.e. overworking yourself), or it could even be imposter syndrome. On the other hand, yes you could just be lazy, or you might just really hate your job. Hell, there have been times where I’ve felt unmotivated because our leadership team were just arseholes - sometimes a lack of motivation goes beyond just your own choices.
There just isn’t enough data in a short post.
Take some leave, go get checked out by a doctor, talk to a friend/partner, take a look at job ads to see if anything sounds better than where you are.