Beginners might not be able to read neither sheet music nor abc notation, so I will provide tin whistle notation for them, presuming they will start with the tin whistle. To that purpose, I have created a typefont to write tin whistle tabs for the D tin whistle. You can download it here.
And this is how you use it once you have installed the font on your computer - the line below the sheet music is what you type on your keyboard. You will have to choose a rather large font size.