How do I use this Dvorak keyboard?

Type on your normal keyboard, and each key types the letter it has on the Dvorak layout. For example, pressing the QWERTY keys d, s, l, s types e, o, n, o. You can also click the keys on the on-screen keyboard, which shows the Dvorak letter on each key with the QWERTY key underneath.

How do I type capitals and symbols?

Hold Shift as usual. Shift gives the capital or symbol of the Dvorak key, so it works the same as on a real Dvorak keyboard.

Can I use it to practise Dvorak?

Yes. Keep your eyes on the on-screen keyboard rather than your own keys, and the key you press lights up. When you've finished, copy your text with the Copy button.