Toilet???
The hell are you talking about? xD

IMO quite simple:
Enter restroom
Lock stall
Do your business
Unlock stall
Wash hands (please with soap and in the sink)
Exit restroom

So where again are you washing your hands in the toilet bowl?

Edit: Forgor to mention: Please don’t wipe without toilet paper. And picking your butt with bare hands is very unhygienic.
Usually you should not touch yourself before reaching the sink to clean yourself.