assuming your friend’s server has php and mysql installed
1 – upload all of wordpress unzipped files to server domain root or folder
2 – create a mysql database, user and password making sure to add the user to the database with all priveleges (mistakes are made here when this is not done)
3 – open wp-config-sample.php in notepad or other basic editor and insert the 4 database values needed – the 1st 3 you created – the 4th you will need to ask your friend what the db connect info is
4 – save wp-config-sample.php as wp-config.php
and upload it to your wordpress install
5 – type in url of install
https://example.com/wp-admin/install.php
putting in your correct info, naturally
should do it