There are many different ways to write Han (Simplified variant), but this is one method that can be used:
1) Start by downloading and installing the Han (Simplified variant) writing software onto your computer.
2) Open the software and create a new project.
3) In the project, create a new script.
4) In the script, write Han (Simplified variant) in the traditional way using characters.
5) Save the script and close the software.
This is just one way that you can write Han (Simplified variant), but there are many others. Experiment and find the method that works best for you.