how to delete all my progress and start from begining

[cherr...@gmail.com]

how to reset progress?

[michalprz...@gmail.com]

Go to the Profile page and scroll to the bottom.

There is a button "reset statistics".

[vos...@gmail.com]

And if you want to just switch to a new set but retain your old scores, you can select a different layout ("I'll be UK today!"). That way your normal stats are preserved, but you can switch to the "UK" layout to try other things out.