For those in the thread looking for advice, I recommend performing overhead squats. Just use a broom handle with a wide grip. It's almost impossible to squat incorrectly when doing overhead squats and imo this makes it an excellent intro. Additionally, it feels amazing once you get stretched and comfy. I trained in Olympic weightlifting for a bit (non-competitively) and this is how they started inflexible people and…
I think it's important not to push the broom handle/PVC pipe practice further than necessary. People can hold a broom handle in all sorts of positions that would be impossible with even an empty bar, possibly ingraining bad habits.
Just to be clear I wasn't intending my comment above to be used as a stepping stone for weighted overhead squats. I just find that keeping a bar overhead forces proper shoulder, spine and hip posture that enables one to squat properly down the road. For some, it causes that "aha" moment when it comes to squatting properly.