If it is not explicitly told in following recipe, setting up services are described for Ubuntu 24.04 server, but applications are described for Xubuntu 24.04 workstation. If you use different Ubuntu version or Linux distribution, settings as well as content, names and places of configuration files may be different!
Got it.

Installing Xubuntu 24.04 workstation

The Xubuntu installation image can be downloaded from: https://xubuntu.org/download/
If you need to prepare a bootable USB stick, see, for example:

The web address for this guide is: http://odo.lv/Recipes/XubuntuSetup

Table of Contents

Installing Xubuntu
Updating after installation
Adding additional repositories and closed source drivers
Additional languages support installation
Using LibreOffice office software

Installing Xubuntu

If you are not sure about WiFi working during installation, use an Ethernet (cable) network!
If WiFi does not work during installation, you will need to install additional drivers, as described below.
For a physical computer
1. Insert the installation USB flash drive into the computer and reboot it
2. Press Esc or one of the F9..F10 keys (if necessary, look for it for your specific hardware) to activate the boot device menu
3. Select boot from USB flash drive
  or
For a virtual computer
1. Point the installation file, for example xubuntu-24.04.3-desktop-amd64.iso, to the CD/DVD drive and run it
When the following window appears, make sure that the Try or Install Xubuntu menu is highlighted (if necessary, select it with the arrow keys) and press the enter key
When the following window opens, double-click the Install Xubuntu 24.04... LTS icon
Select English language and press Next
Select English keyboard layout
If you use a wired network, press Next, if necessary, select another network type
If you do not want to download and use the latest installation wizard, press Skip
Select Interactive installation and press Next
Select Xubuntu Desktop and press Next
Check Install third-party software... and Download and Install Support for ... Media formats and press Next
Check Erase disk and install Xubuntu and press Next
Warning
If necessary, you can choose Something else and see manual partition creation!
In the Create your account window, enter:
1. Your name: Student (usually full name and surname with all soft and long letters)
2. Your computer's name: xubuntu (standard lowercase Latin letters and hyphen)
3. Your username: student (standard lowercase Latin letters)
4. Password: Student007 (any letters, uppercase/lowercase are distinguished)
5. Confirm password: Student007
6. Leave Require my password to log in selected
7. Press the Next button
Select Location Riga and Timezone Europe/Riga and press Next
Review the installation settings and press Next
Wait until the installation is complete Xubuntu operating system installation process.
When the installation is complete, click the Restart now button, and remove the USB flash drive
Wait until the computer reboots, select the user student in the login window, enter the password and click the Login button

Updating after installation

The software prepared in the images on a CD or USB drive is updated, on average, twice a year. But the software in remote software repositories is updated much more often. Therefore, after the initial system installation, it is likely that you will need to immediately perform a software update.

If the Software Updater window appears when the Xubuntu desktop opens, click the Install Now button:
Enter your password and click the Authenticate button
If the Your computer must be restarted to finish installing updates window appears after the settings are applied, click the Restart Now button, otherwise click OK

Adding additional repositories and closed source drivers

By default, the Xubuntu operating system does not offer non-free programs that use closed standards, etc. that are not offered by Canonical. Therefore, it is advisable to add additional software repositories.

Activate the start menu to Settings — Software & Updates:
If necessary, enter your password and click the Authenticate button
In the Software & Updates window, open the Other Software tab and make sure that the repository is selected
Information
By default, Xubuntu does not install third-party drivers that do not have source code available, because their support depends on the device manufacturer (which is usually not brilliant).
Warning
Install closed-source drivers only if one of the computer's devices (for example, wireless network, graphics card) is not working.
Open the Additional Drivers tab
If the computer is offered to use closed-source drivers, you can select them and click the Apply Changes button:

Additional languages support installation

Activate the start menu Settings — Language support
If necessary, check that Latvian language is installed
If necessary, add other languages and adjust Regional formats settings

Using LibreOffice office software

To open LibreOffice office software, for example, a text editor, activate the start menu LibreOffice Writer
If you are interested, click the Release information button. If not, click the × button next to it. If you are not interested in reading daily tips, clear the Show tips at startup check box and click the OK* button
Make sure that the document text is set to Latvian and the Automatically check spelling box is checked
If so, congratulations, your computer is ready to work