Sitting can be healthy, check Ramses
I once saw a photo of these amazing monuments when I was a kid. The sensation I got from them, even through a 2D medium was incredible and heavily supported my practical research on how to sit correctly.
Do you know how many billions of atoms you have between your toes and your head?
Look at those Ramses and try to feel like them. Check my quite old tutorial on correct sitting (IT'S NOT YOUR 90/90/90 Standard) in the Ageless Motion YouTube channel.
Please bring this into your life and stay tune for more in-depth tutorials on how to automate this practice and more cues. Do you have a question, post it below, you can even post a picture of your sitting attempts or video. I will give you my assessment.