I use an adjustable shower curtain rod that had a spring loading to help keep it in place. And then a motor/bicycle handlebar mount. Worked great. I’m able to get over the shoulder and to see out the front and the instrument panel.

Here’s the one I used: https://www.amazon.com/dp/B07BJ3VT9L/ref=cm_sw_r_cp_apip_N1tp83vrubait

And the mount: https://www.amazon.com/dp/B074Z7F4WQ?ref=yo_pop_ma_swf