You need to open PHPMyAdmin ('servername/phpmyadmin' should work if it's installed). It should look like this:
Then you can just put a database name into one of the places I circled and click create.
You'll then see this screen:
Where you can add a table with however many fields (columns) you want.
The rest is pretty self explanitory.
Phpmyadmin takes a bit of getting used to but you should be able to pick it up quickly.
If it's not installed on your server you should have something similar which will do the same thing.
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