After installation, open your browser to http://localhost:4386/ to access your own Fidus Writer installation.
Click on "Sign up" to create a new user. Alternatively, you can create a new user by running the following command in a terminal:
It will ask you for the username and password of the user you want to create.
Then log in with the user you created in step 2.
If you want to configure your instance, run
fiduswriter.configure. There are more detailed instructions on how to set it up as a full installation on a server with https, etc. here: https://github.com/fiduswriter/fiduswriter/wiki/Installation-and-configuration-on-Ubuntu-using-snap .