Anyone have to sit at work all day?

I have to sit for 9 hours 5 days a week and the way my desk is set up I can’t extend my legs AND work on my computer.

My monitors don’t adjust so if I decide to stand up for a while to relieve pressure I have to bend over in order to see my computers and that also hurts like hell 🙄

Anyways anyone sit all day and start to feel faint or dizzy and weak? Like sometimes I literally have to get up and go lay down and then I start to feel better immediately. Thinking about quitting this job but I just started in February 🥴 doesn’t seem worth it atp I’d rather be waking up going for walks and being active during the day 😭 I feel stuck in place and miserable.