create a automatic test procedure using Automation app on samsung phone

THIS IS NOT AN APP DEVELOPMENT, JUST CREATING AUTOMATION ON AN EXISTING APP.

I would like to create an automation procedure on Samsung phone using EXISTING Automation app.
I prefer using Automate, but I am open to any other app, whether its free or paid.

The automation app should be able to
Open an app
make a selection
lock selection
open phone app
punch in few numbers
take screen shot

Open another app
wait a number of seconds
take screen shot

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I will provide exact procedure with more details once a freelancer is selected.