Can I type in Oriya script in libreoffice writer using keyman?
There are several keyboards in the Keyman collection of keyboards that might provide a way to type the characters in the Oriya script. You can investigate them at Keyboard Search
Several of them allow for testing the keyboard layout online.
When you find one that you like, you can download it and install it on your computer. You’ll need the Keyman program itself for whatever type of computer you are using (Windows, Mac, Linux) plus the keyboard package for whichever keyboard you would like.
In addition, you will need a font installed that supports the Oriya script. In LibreOffice writer, select this font, then activate the keyboard and you should be able to type.
If anything is unclear, please ask more questions.