I would go 0-30 before I would go 0-9. 0-9 means you beat yourself, you psyched yourself out of the game.
Don't be embarrassed by your failures, learn from them and start again.
And I urge you to please notice when you are happy, and exclaim or murmur or think at some point, 'If this isn't nice, I don't know what is.'
The interplay between syntax and semantics is central to the study of formal languages.
The heart of a mystery is not the crime, but the people involved.