A real bidet is well worth a modest investment if you have the cash to spare, but this could work too.
I would just suggest rubber-banding the sprayer into the “on” position and keeping a kink in the hose easily reachable in front of the toilet. That way, you can simply unkink the hose to spray and rekink it when you’re done. No need to reach down under the dirty bits just to activate it.
Thank you for the reminder. Pretty sure I have two random gadgets sitting around on month 3 or 4 somewhere, so now I have a great activity for the weekend, or not, we will see.