Apple Watch Workout app Pacer display unstable with zoom and notifications

I have a problem using pacer on the running workout app on my Apple Watch 10. I find it impossible to keep the screen stable when running. There are only two pieces of info I'm interested in when running : the red figures showing how much my average pace is below the target pace I set and the green figures if my average is faster. My natural eyesight isn't good enough to read the figures but I don't want to run wearing my glasses. So I select zoom in the accessibility settings, adjust the amount of magnification this will give me, and navigate to the bit of the unmagnified screen that has the red or green figures. I do this all this having started the run and immediately paused it while I select these settings. The other relevant setting I use when running the wake gesture of lifting my wrist. Then I resume the run and actually start moving. But when the watch automatically goes into a lower power mode, and I wake it by lifting my wrist, either the magnification I started with has often changed and/or the part of the screen I'm seeing has shifted, so I can't see the red or green figures. Also, although I select aircraft mode to stop seeing notifications, unwanted messages about my running still get through ands take over the screen and I can't seem to stop them. Once a message appears it invariably throws out my magnification and placement settings. In reality what I want to do seems very simple and obvious - keeping a stable and readable view of the red or green figures while I'm running - but so far it seems unachievable. Apple support suggested using the raindrop icon to fix the screen view but that made no difference. Any advice anyone?