Check the languages in the keyboards section of your computer. The single-handed Dvorak is no more strange than Qwerty, German, or Spanish. It is no more difficult to install. It is no more difficult to uninstall. Here are some of the keyboard layouts that you can ask for on my WIN 3.1 computer.
Many people remember key cap covers in typing class.
During the first few days of learning a new keyboard it maybe helpful to change the key caps. Young children will need key caps changed. You can do this with paper stickons. You may move the caps on some keyboards. If you own the computer and want to you may change them permanently.