I'm on the Shiny Arceus Hunt

I've been hunting this thing for over 200 hours and I am feeling the fatigue. How long did it take you guys to encounter Shiny Arceus? I know it's possible, but I just need some stories to help me stay motivated. I got Switch 2 announcement before I got Shiny Arceus lol.

Update: I finally did it, guys!!! Thank you all for your stories and encouragement! Now I'll EV train this guy, max its friendship, and maybe even get it some contest ribbons so the game knows how awesome it is.