Have a hard time sleeping due to my "lazy" body? Can't sleep because of it, so I'm trying to stay positive and wake up in the morning. Any advice?

24F here.

I'm currently using a sleep aid called "Deep Breathing Therapy" for my insomnia. It helps me sleep better but it also hurts my chest and shoulders pretty bad.

I'm not really sure what to do about it because I have a "lazy" body (I've been keeping up this habit since when I was 15) and it doesn't really help with my depression and anxiety. I'm not sure what to do about it.